Draw the influence lines for

a$)$ vertical reaction at $A.$

b$)$ vertical reaction at $B.$

c$)$ moment at B$.$

d$)$ moment at $C($which is at the midpoint of span $AB).$

e$)$ How should a uniform live load be placed on the span to maximize the negative moment at $B?$

f$)$ What is the maximum negative moment at $B$ in terms of the uniform live load, w$?$

g$)$ How should a uniform live load be placed on the span to maximize the positive moment at C$?$

h$)$ What is the maximum positive moment at $C$ in terms of the uniform live load, $w?$