Hello,

I'm working on this assignment that is due in 2 hours, and I'm not quite sure about these two questions that I have yet to complete before I can submit this assignment.

1. Give the reasons for each of the steps provided to validate the argument

[(P → Q) /\ (¬R \/ S) /\ (P \/ R)] → (¬Q → S)

Step:

a) ¬(¬Q → S)

b) ¬Q /\ ¬S

c) ¬S

d) ¬R \/ S

e) ¬R

f) P → Q

g) ¬Q

h) ¬P

i) P \/ R

j) R

k) ¬R /\ R

l) therefore ¬Q → S

2. Find the value of the Boolean expression

(wz + yx' + wy')(y'x + zx') + ( (w + y)(x' + y) )'

if

a) w = x = 0 and y = z = 1

b) w = y = 1 and x = z = 0

I shall review this material after I submit the assignment and will learn and understand it better. Right now, I just really need to get this handed in. Any help would be much appreciated.

Thank you kindly!