Problem $2(70$ pts $)$ For the frame shown below,

a$.$ Determine reaction forces at point A$.$ Point A is a fixed support. $(20$ pts$)$

b$.$ Determine reaction forces at point D$.$ Point $D$ is a pin support. $(15$ pts$)$

c$.$ Draw shear diagram for the frame. $(15$ pts$)$

d$.$ Draw moment diagram for the frame. $(20$ pts$)$

$E=29000$ksi,$I=2070i{n}^4$ for all components.

This an indeterminate structure, use the virtual work method.