$2.$ Complete the truth table for the following Boolean function s which takes two inputs, a and b $(5$ points$).$

s$($a$,$b$)=$ a $+$ ab

a b s$($a$,$b$)$

$3.$ Then provide the HDL code to implement the function in question $2.$ You may assume that the chips Nand, Not, And, Or are available to use $(5$ points$).\backslash$