HI, i need help just in the second en third exercise cause I got the answer in the first question, and I put it here for information, is necessary that you use some method for the roots. If you write in hand not problem, just must be clear, thank you so much

0.2 1 1.8 26 3.079463 4.682942 6.505851 -3.424919 Calculate an interpolation polynomial for this data. = 3.89742?>75x3 + 1 13638725132 7.3993935x+ 4.1159505 2. Analytically derive the obtained polynomial and calculate its roots for find the critical points of the function. (you use one of next: Bisection method, False rule method, Newton-Raphson method, Secant method, MUIIer method) 3 Derivative again and determine if critical points are maximum, minimum or turning points