f(x) = 2 + (0.3 * x)
a = LowerSum(f, 0, 24, 24)
b = UpperSum(f, 0, 24, 24)
c: (a + b) / 2
Vieleck1, d, e, g, h = Polygon((0, 0), (24, 0), (24, f(24)), (0, 2))
i = Integral(f, 0, 24)