diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 96549d2..3e68170 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -160,9 +160,16 @@
   },
   "active": "98e0287d38212615",
   "lastOpenFiles": [
+    "4a1s/MFES/PL - Aula 3.md",
+    "4a1s/index.md",
+    "Excalidraw/Drawing 2023-10-04 09.18.24.excalidraw.md",
+    "Excalidraw/Drawing 2023-10-04 09.18.23.excalidraw.md",
+    "4a1s/MFES/PL - Aula 2.md",
+    "4a1s/MFES/T - Aula 2.md",
+    "4a1s/MFES/PL - Aula 1.md",
+    "4a1s/RAS/PL - Aula 3.md",
     "4a1s/RAS/PL - Aula 2.md",
     "4a1s/RAS/PL - Aula 1.md",
-    "4a1s/RAS/PL - Aula 3.md",
     "4a1s/ESR/TP1 -  To Do.md",
     "4a1s/DAA/PL - Aula 2.md",
     "4a1s/ESR",
@@ -178,18 +185,11 @@
     "Excalidraw/Drawing 2023-09-27 09.57.48.excalidraw.md",
     "4a1s/CP/PL - Aula 3.md",
     "4a1s/CP/T - Aula 2 - 19 Setembro.md",
-    "4a1s/MFES/T - Aula 2.md",
-    "4a1s/MFES/PL - Aula 1.md",
     "4a1s/CP/PL - Aula 2.md",
     "4a1s/RAS/T - Aula 2.md",
     "4a1s/RAS/Notas Projeto RAS.md",
     "Excalidraw",
     "4a1s/DAA/PL - Aula 1.md",
-    "4a1s/MFES/MFES - UC Details.md",
-    "4a1s/MFES/PL - Aula 2.md",
-    "4a1s/index.md",
-    "4a1s/Excalidraw/MFES/Ficha1_ex2.excalidraw.md",
-    "4a1s/Excalidraw/ASCN/SOA.excalidraw.md",
     "-.32118",
     "4a1s/ASCN/T",
     "4a1s/ASCN/T.32118",
diff --git a/4a1s/MFES/PL - Aula 2.md b/4a1s/MFES/PL - Aula 2.md
index 5feb264..38b686d 100644
--- a/4a1s/MFES/PL - Aula 2.md	
+++ b/4a1s/MFES/PL - Aula 2.md	
@@ -1,7 +1,7 @@
 ---
 dg-publish: true
 ---
-25 Setembro 2023 - #MFES 
+🌫 25 Setembro 2023 - #MFES 
 
 ## Links de Resolução de Exercícios
 1. https://colab.research.google.com/drive/1hz-eUtQNTV_IeOh2mvOWvm0uG7ob5vGG?usp=sharing
diff --git a/4a1s/MFES/PL - Aula 3.md b/4a1s/MFES/PL - Aula 3.md
new file mode 100644
index 0000000..b71dab4
--- /dev/null
+++ b/4a1s/MFES/PL - Aula 3.md	
@@ -0,0 +1,5 @@
+🌫 2 Outubro 2023 - #MFES 
+
+## Links de Resolução de Exercícios
+- https://colab.research.google.com/drive/1DEqtSGpShq-Pp9TIA53lb7zZpgr-dn1e
+- https://colab.research.google.com/drive/1ahV4QvHHfTOMXW8Tt1GyWuI4Z0PHvjHT
diff --git a/4a1s/RAS/PL - Aula 3.md b/4a1s/RAS/PL - Aula 3.md
index a7ab0e5..d294d22 100644
--- a/4a1s/RAS/PL - Aula 3.md	
+++ b/4a1s/RAS/PL - Aula 3.md	
@@ -1,3 +1,6 @@
+---
+dg-publish: true
+---
 4 de Outubro 2023 - #RAS 
 
 >[!help]+ Ex. 7.1
@@ -21,4 +24,17 @@
 >4. The product shall use always menu screens to communicate with the users.
 >   
 >>[!hint]- Resolution
->>Option 2 is the correct one.
+>>Option 1 does not constitute a valid system requirement.
+
+
+>[!help] Ex 7.5
+>The following are requirements of a controller of a swimming pool: R1: The input valves should be open when the swimming pool is filling. R2: The input valves stop when the level of the water reaches 2 m. R3: The level of the water should increase gradually. R4: The output valves must be open when the water is higher than 2.1 m. Which defects this set of requirements present?
+>
+>1. ambiguous
+>2. solution-dependent
+>3. incomplete
+>4. not verifiable
+>
+>>[!hint]- Resolution
+>>Option 
+