$i.$ Simplify the given Boolean expression $x$ using Boolean algebra.

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$\frac{?}{\text{b}\text{a}\text{r}}\frac{A}{b}ar(B)CD\frac{+}{b}ar(A)\frac{B}{b}ar\frac{C}{b}ar(D)+A\frac{B}{b}ar(C)D+$ABCD$+A\frac{B}{b}ar\frac{C}{b}ar(D)\frac{+}{b}ar\frac{A}{b}ar\frac{B}{b}ar(C)D+\frac{A}{b}ar(B)\frac{C}{b}ar(D)$

ii$.$ Draw the simplified Boolean expression for $x$ using NOR gates only.

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