Problem $1$ Graphical Analysis, Erratic Rectilinear Motion If a particle $($racecar$)$ starts from rest, $v_0=0$

$\frac{m}{s},$ and accelerates according to the graph shown$(\frac{m}{s^2}),$ what is particle's velocity at:

a$.t=10sec?{?}_{?}$

b$.t=25sec?{?}_{?}$

What is particle's displacement $s$ meters $($if $s_0=0)$ at:

a$.t=10sec?$

b$.t=25$ sec$?$