How do I solve this?

X 8) Let H(x) = f(t) dt, where f is the function shown. Graph of f a) Find H(0). b) On what interval(s) of x is H increasing? Justify. c) On what interval(s) of x is H concave up? Justify. d) Is H(12) positive or negative? Explain. e) For what values of x does H achieve its maximum value? Explain