3) Use the MATLAB minimization function fminbnd to find the minimum and maxim values of the function y-e (1+3x3)-1, in the range x = -5 to +5. Given the equation: (10 points) ex (1+5x)=1 How many positive roots does the equation have? Plot the function over a range of x values to show those roots. ) Use the secant method to find the roots. (10 points)