Consider the three$-$reservoir problem. All pipes are made of relatively smooth steel, $fx=0\mathrm{.}012,$ fy $=0\mathrm{.}013.$ Minor losses are negligible. Kinematic viscosity of water is ${10}^{-6}\frac{m^2}{s}.$ If water flows out of the $150-m$ elevation reservoir, the elevation of the energy grade line at $P,$ in meters is$,$ most nearly:

a$)160$

b$)170$

c$)180$

d$)200$

$.300m$

$.150m$