Hi$,$ ive been struggling with these two exercises would really appreciate answers with steps. Thanks.Exercise $3$

The forearm and biceps support a load at point A as shown in Figure $3.$ C can be assumed as a pin support.

The biceps pulls on the bone along BD$.$

$($a$)$ Determine the resultant internal loadings acting on the cross section of the bone of the forearm at

point F for

$($i$)$ A mass of m$=2$kg at A

$($ii$)$ A mass of m$=6$kg at A

$($b$)$ Assuming the same geometry is maintained, what mass mkg at point A would cause the force in the

bicep to reach $650$ N $($close to maximum limit for average bicep muscle$)?$

Exercise $4$

The boom DF of the jib crane, and the column DE$,$ have a uniform weight of $900$N$//$m$.$ If the hoist and load

weigh $2000$ N $,$ determine the resultant internal loadings in the crane on cross sections through points A$,$ B$,$

and C$.$ Finally, determine the support reactions at point E$.$