$2-(25)$ A reducing elbow is shown. The fluid is water.

In terms of $Q,{}_{\text{w}\text{a}\text{t}\text{e}\text{r}},g,P_1,P_1,A_1,A_2,V_1,V_2,,$Vol and $W_E$

$($a$)(15)$ First express and then calculate the $x$ direction of force, and

$($b$)(5)$ First express and then calculate the $y$ direction of force acting on the elbow.

Note: ${}_{\text{w}\text{a}\text{t}\text{e}\text{r}}=1000k\frac{g}{m^3}$;$g=9\mathrm{.}8\frac{m}{s^2}$