Two blocks a and b connected to each other by a string. a constant upward force F$=60$ N$,$ is applied to block A as shown below. Starting from rest, block B descends by $7\mathrm{.}8$ m in $4\mathrm{.}2$ s$.$ The tension in the string between the two blocks is $38$ N$.$

Draw the free body diagrams for block A and Block B