Can someone help with polynomial interpolation in matlab

1. Which polynomial can perfectly fit the data points below 15 21 10 18 12 5 2. Fit the curve using Polynomial Regression. Do not use Matlab buit in technique. 18 31 20 18 12 6 12 15 21 10 10 11 12 a. 1 Order Polynomial, y- a1x ao b. ndOrder Polynomial, y azx2 azx ao 3. Use interpolation to determine Tat D 1.3 and D2.6 10 a. Use linear Interpolation b. Use 2nd Order polynomial Interpolation