$(4)$ Using $-$ONLY$-$ NAND GATES, create a GATE DIAGRAM that gives the same result

as the given logical statement.

$(4.$Ex$)($A AND B$)$ OR $!$B

$(4\mathrm{.}1)($A OR B$)(10$pts$.)$

$(4\mathrm{.}2)($A XOR B$)(15$pts$.)$

DRAW IT OUT