$($Please help with number three$)$

QUESTION TWO

Consider the frame loaded as shown in Figure $1$:

Figure $1$

a$)$ Assuming modified stiffness for member $BC,$ what is the stiffness of joint $B?$

b$)$ Determine all fixed end moments;

$(4$ Marks$)$

c$)$ Using moment distribution method obtain all member end moments;

$(6$ Marks$)$

QUESTION THREE

$(5$ Marks$)$

For the frame shown in Figure $1,$ sketch the bending moment diagram indicating clearly the critical values and sketch the elastic curve.

QUESTION FOUR

$(15$ Marks$)$

For the frame shown in Figure $1,$ sketch the shear force diagram and determine all the support reactions.

$(15$ Marks$)$