A car begins from rest at time t=0 , and then accelerates along a...

A car begins from rest at time $t=0$, and then accelerates along a straight track during the interval (0 \lt t \leq 2 $\mathrm{~s}$) and thereafter with constant velocity as shown in the graph. A coin is initially at rest on the floor of the car. At (t=1 $\mathrm{~s}$), the coin begins to slip and its stops slipping at (t=3 $\mathrm{~s}$). The coefficient of static friction between the floor and the coin is (\left($g=10$\mathrm{~m}$/$\mathrm{s}^$2\right))