Please help me with this question, thx!

QL (a) The forward difference approximation of the rsborder derivative of the function x) at x: can be f'(x.) 5 MM 2h . where h is the step size. Find the estimation of its truncation error through error analyms. (6 marks) 03) The energy consumption in six months of 2019 recorded by a company is shown in Table Q11 Estimate the energy consumption in May by using the third-order Lagrange interpolating polynomial. (Round your answer to 3 decimal places). (6,5 marks)