MATLAB - PLEASE HELP

5. (a) Write a matlab program to interpolate r = | -5 -4 -3 -2 y = [ -0.1923 -0.2353 -0.30 -0.40 -1 0 1 2 -0.50 0.00 0.50 0.40 3 4 5 ]. 0.30 0.2353 0.1923 ]. (b) Calculate error at the interpolated values at x = -4.5, -3.5,..., 3.5, 4.5 compared with the exact function f(x) = x/(22+1). Are these errors reasonable? (c) Plot the exact function, the interpolating polynomial and the node points on the same graph. Where is the error the largest? Comment