Q$3.($score $40)$

Support A is a pin support and support C is a

roller support.

a$.$ Draw a free body diagram $($FBD$)$ of the

above structure.

b$.$ Determine the magnitude and direction

of vertical reaction at support C $($roller$).$

c$.$ Determine the magnitude and direction

of horizontal reaction at support A $($pin$).$

d$.$ Determine the magnitude and direction

of vertical reaction at support $A($pin$).$