Problem 5: a- Use trapezoidal rule to integrate the following function from a = 0 to b = 0.8. i(x) = 0.2 + 25x-200 x2 +675 x 3-900 x 4 +400 x 5 Compare the result with exact value. Use Excel or Matlab. Upload Excel file or M-file. b- Use Simpson's 1/3 rule to find the integration of the above mentioned function from a 0 to b=0.8