$3.$ Given the following pump data: $10$ ft $$positive suction head, $198$ ft $$discharge head, $16$ ft $$friction loss, $421$ gpm$$flow$,$ Motor eff. Is $80\%$ and Pump eff. Is $90\%.$ What is the whp that the pump delivers

a$.23\mathrm{.}88$ whp

b$.20\mathrm{.}79$ whp

c$.22\mathrm{.}92$ whp

d$.21.74$ whp

answer is d

give me proper$/$correct solution