can someone help? the andwer for b is 32 i just dont know how to get that

: (a) Find all intersection points of the graphs of y = x2 and y = 8 - x2 on the interval [0, 4]. (b) Find the area between the graphs of y = x2 and y = 8 -x2 on the interval [0, 4]. (A) x = 0 and x = 2 (B) x = 2 only (C) x = 4 only (D) x = 0 and x = 4 (E) x = 2 and x = 4