A$.)$ Determine the internal normal force at point$$C

$.$ Take$$F$1=465$ lb $,$F$2=174$ lb $,$F$3=323$ lb $.$

B$.)$ Determine the shear force at point$$C

$.$

C$.)$ Determine the moment at point$$C

$.$

D$.)$ Determine the internal normal force at point$$D

$.$

E$.)$ Determine the shear force at point$$D

F$.)$ Determine the moment at point$$D