Points: U or $1$

For the following function find $($a$)f(4),($b$)f(-\frac{1}{2}),($c$)f(a),($d$)f(\frac{2}{m}),$ and $($e$)$ any values of x such that $f(x)=1.$

$f(x)=4x^2-44x+121$

$($a$)$ Find the value of $f(4).$

$f(4)=$

$$