please help, business calculus

65-In this Problem f(x) is continuous on (-, ). Use the given information to sketch the graph of f.

f (-2) = 4, f (0) = 0, f (2) = -4

; f (-2) = 0, f (0) = 0, f (2) = 0

; f(x) > 0 on (-, -2) and (2, )

; f(x)

81- use the given graph of y = f(x) to find the intervals on which f(x)> 0, the intervals on which f(x)

81