Part C is as important as the others:)

Determine the real roots of f(x) = -2x^2 + 3x + 8.5 (a) Graphically. (b) Using the quadratic formula. (c) Using three iterations of the bisection method to determine the highest root. Employ initial guess after each iteration of x_1 = 1 and x_u = 5. Compute the approximate error elementof_a and the true error elementof_t after each iteration (both are percent relative errors)