Problem$)$ Using the force method, answer the following questions.

Given that point A is a fixed support and point C is a hinge, and the modulus of elasticity

E$=200$GPa:

$($a$)$ Determine the moment at each joint.

The frame structure in the given figure is indeterminate. The solution should use the force method in the form $0=\backslash$Delta A $+($A x $)($f AA$).$ The moments at each joint are M A$=2\mathrm{.}29$kNm$,$ M B$=19\mathrm{.}4$kNm$,$ and M C $=0.$ I know the answers, but I want to understand how these results are derived using the mentioned force method. Whenever I ask this question, everyone gives a different answer.