4. For the expressions in Question 3, draw the circuit diagram of the starting expression and the simplified expression A a. B b. Before Simplification (S' +T)' (A.A) + (A')' 5. Translate the following diagram into a Boolean expression, and simplify it: After Simplification 4. For the expressions in Question 3, draw the circuit diagram of the starting expression and the simplified expression A a. B b. Before Simplification (S' +T)' (A.A) + (A')' 5. Translate the following diagram into a Boolean expression, and simplify it: After Simplification