QUESTION $2$

Given $Y\frac{?}{b}=ar(AB+(\frac{?}{\text{b}\text{a}\text{r}}(A))B(\frac{?}{\text{b}\text{a}\text{r}}(D)))+\frac{A}{b}ar(B)C+\frac{A}{b}ar(C)$

a$)$ Illustrate the expression using a decoder and an OR gate.

b$)$ Identify the type of decoder in $($a$).$

c$)$ Simplify the expression using Karnaugh map.