Shown is a frame with $A$ as fixed support and point $C$ as a roller support. El is constant. The parameters are as follows, Loads: $W=$

$10k\frac{N}{m},P=40kN$ applied at point $D$ as shown, Dimensions: $a=2$

$m,b=4m$ and $L=8m.$

What is the reaction at $C?$

$3\mathrm{.}8$: what is the shear for member $BC$ at end $C?$