$(6\%)$ Problem $14$: A detailed graph of velocity versus time is shown.

$17\%$ Part $($a$)$ What is the velocity at time $13\mathrm{.}5s?$

$v=30\mathrm{.}00\frac{m}{s}$

$$ Correct!

$17\%$ Part $($b$)$ What is the acceleration at time $13\mathrm{.}5s?$

$a=0\mathrm{.}000\frac{m}{s^2}$

$$ Correct!

$17\%$ Part $($c$)$ What is the acceleration

$\frac{m}{s}$