Let $\displaystyle {f{{\left({x}\right)}}}={\frac{{{x}^{{2}}+{6}{x}+{8}}}{{{2}{x}+{4}}}}$.

(a) $\displaystyle {f}'{\left({3}\right)}=$ Preview Question 6 Part 1 of 2  

(b) $\displaystyle {f}{''}{\left({3}\right)}=$ Preview Question 6 Part 2 of 2  

[NOTE: There are two ways to do this problem. The first is the quotient rule. The second is much easier and does not use the quotient rule.]