I need help with the antiderivate

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I need help with the antiderivate

1.Find the antiderivative F of f that satisfies the given condition. Check your answer by comparing the graphs of f and F.

f(x) = 5x4 − 2x5,F(0) = 8

2.Find f. (Use C for the constant of the first antiderivative and D for the constant of the second antiderivative.)

f”(x) = 28x3 − 15x2 + 10x

3.Find
f.

f ”(θ) = sin θ + cos θ,f(0) = 4,f ‘(0) = 4