Two identical rectangles, A and B $,$ of dimensions $L_{1}x{L}_2$ are drawn on the surface of a semi$-$infinite flat

plate as shown in Fig $2.$ Rectangle A is oriented with side $L_1$ along the leading edge while rectangle B

is oriented with side $L_2$ along the edge. The plate is maintained at uniform surface temperature. $($a$)$ If the

flow over rectangle $A$ is laminar, what is it for $B?($b$)$ If the heat transfer rate from plate $A$ is $435$ W $,$

what is the rate from plate $B?$