Fourth order runge kutta method

Question

Assignment:

Use Runge-Kutta method of order four to approximate the solution to the given initial value problem and compare the results to the actual values.

y' = e^t-y , 0≤t≤1, y(0) = 1  with  h = 0.5 ( Interval )

Actual Solution  is  y(t) =  In(e^t + e - 1)

Provide complete and step by step solution for the question and show calculations and use formulas.