Q$\mathrm{.}4(35$ pts$)$

The two blocks are arranged as shown on a horizontal surface. The horizontal surface is smooth $($no friction$).$ Block $A$ is subjected to a horizontal force of magnitude P$.$ If the coefficient of static and kinetic friction between A and $B$ are $=0\mathrm{.}3$ and $=0\mathrm{.}25,$ respectively, determine the acceleration of each block

Toke: P$=200$N$,m=20kg,ms=30kg$