Question

Evaluate the following integration: I(f) = integral sign from 0 to 20 of e^(-x) dx

1. Analytically
2. Rectangle method with h= 10,5,4,2,1.
3. Mid-point method with h= 10,5,4,2,1.
4. Trapezoidal method with h= 10,5,4,2,1.
5. Simpson's method with h= 10,5,4,2,1.
6. Using analytical and numerical solutions of 2) to 5) to calculate error e = | I(f) - I(f) | [absolute value of (analytical - numerical)]

Thanks a ton. =)