Consider the regular expression

$R=(aa{)}^{**}+b{a}^{+}+(ab{)}^{**}$

a$)$ Construct an NFA for the above regular expressian.

b$)$ Construct a regular grammar G$,$ for the lang$$age gener atedt tiv the lfitif expression $a{a}^{**}(a\frac{b}{a}{)}^{**}.$