1. The problem statement, all variables and given/known data `Suppose it is known that the graph of the function y= ax^2 +bx^2+cx+d passes through four given points (x_i,y_i), i = 1,2,3,4. Write a user defined function that accepts these four points as input and computes the coefficients a,b,c and d. The function should solve four linear equations in terms of the four unknowns a,b,c,and d. Test your function for the case where (x_i,y_i) = (-2,-20), (0,4), (2,68), and (4, 508), whose answer is a = 7, b = 5, c = -6, and d = 4. 2. Relevant equations 3. The attempt at a solution Is there anything that can do something like a reverse polyval? Any ideas?