Shown below is the prime implicant chart for a completely specified four-variable combin...

Shown below is the prime implicant chart for a completely specified four-variable combinational logic function r(w, x, y, z).

(a) Algebraically express r as a product of maxterms.

(b) Give algebraic expressions for the prime implicants labeled A, C, and D in the table.

(c) Find all minimal sum-of-product expressions for r. You do not have to give algebraic expressions; instead just list the prime implicants (A, B, C, etc.) required in the sum(s).