I have a question on Boolean algebra
I have to simplify the following expressions-
(1) x = ABC+A'C (where A'=notA)
= BC(A+A') = BC(1) = BC
(2) q = R'S'T'(R'+S'+T')
= R'R'S'T'+S'R'S'T'+T'R'S'T' = R'S'T+R'S'T'+R'S'T' = R'S'T'
(3) z = (B+C')(B'+C)+A"+B'+C"
(4) y = (C'+D')+A'CD'+A'B'C'+A'B"CD+ACD'
Im new to the Boolean algebra and want to know if the first two questions(1&3) are correct.
and if possible,i need some help simplifying the last two question(3&4) I have no idea were to start