Please help with the white part. The black part is what I have so far

iv) Find a polynomial of degree five y=d5+ d4x4 + d3x3 + d222 + da + do that best fits the points given above. Follow the steps in part(i) and examples. Define the matrix D4 and solve the equation. Type : RRD4AGUM = rref([D4' * D4 D4' * b]) Enter Your Answers for d5, d4, d3, d2, d and do as Type : d5 = Your answer for d5 Type : d4 = Your answer for d4 Type : d3 = Your answer for dz Type : d2 = Your answer for d2 Type : di = Your answer for di = Type : do = Your answer for do = [>> D4=[X.^5 X.^4 X.13 X.^2 X E4(:,3)] D4 = 243 1 -1 7776 16807 81 1 1 1296 2401 27 1 -1 216 343 9 1 1 36 49 3 1 -1 6 7 1 1 1 1 1 [>> RRD4AGUM=rref([D4'*D4 D4'*b]) RRD4AGUM = 0 1.0000 0 0 0 1.0000 0 0 0 0 1.0000 0 0 0 0 0 1.0000 0 0 -0.0079 0.1270 -0.6349 0.8730 0.6429 0 0 0 1.0000 0 -0.0063 0.1265 -0.7753 1.3735 1.2816 0 0 0 0 iv) Find a polynomial of degree five y=d5+ d4x4 + d3x3 + d222 + da + do that best fits the points given above. Follow the steps in part(i) and examples. Define the matrix D4 and solve the equation. Type : RRD4AGUM = rref([D4' * D4 D4' * b]) Enter Your Answers for d5, d4, d3, d2, d and do as Type : d5 = Your answer for d5 Type : d4 = Your answer for d4 Type : d3 = Your answer for dz Type : d2 = Your answer for d2 Type : di = Your answer for di = Type : do = Your answer for do = [>> D4=[X.^5 X.^4 X.13 X.^2 X E4(:,3)] D4 = 243 1 -1 7776 16807 81 1 1 1296 2401 27 1 -1 216 343 9 1 1 36 49 3 1 -1 6 7 1 1 1 1 1 [>> RRD4AGUM=rref([D4'*D4 D4'*b]) RRD4AGUM = 0 1.0000 0 0 0 1.0000 0 0 0 0 1.0000 0 0 0 0 0 1.0000 0 0 -0.0079 0.1270 -0.6349 0.8730 0.6429 0 0 0 1.0000 0 -0.0063 0.1265 -0.7753 1.3735 1.2816 0 0 0 0