If ∫01(f(x)+3x2)dx=5\int_{0}^{1} (f(x) + 3x^2) dx = 5∫01(f(x)+3x2)dx=5, what is the value of ∫01f(x)dx\int_{0}^{1} f(x) dx∫01f(x)dx?
222
333
444
888