$20.)$ A pump draws water form a reservoir $A$ at elevation shown and lifts it to reservoir $B$ at the given elevation. The loss of head from A tol is three times the velocity head in $200mm$ diameter pipe and the loss of head from $2$ to $B$ is $14$ times the velocity head in the $150mm$ diameter pipe.

Determine the pressure head at $2$ in meters when the discharge is $0\mathrm{.}05\frac{m^3}{s}.$

A$.)71\mathrm{.}42m$

B$.)75\mathrm{.}34m$

C$.)90\mathrm{.}30m$

D$.)80\mathrm{.}21m$