Question 1 in a u e Consider the function rx)--15x6-2x4 + 12x Use Plot the given function. Is the function concave for all values of x? Justify and explain your answer. Differentiate the given function and then use the bisection method to solve for the answer to four decimal places.) Include a table of variables for the root, number of iterations, xl, xu, xr, f(xl), f(xu), f(xl)*f(xu) Em nding value of x terate until : 1 % (Round the final an Th in and