MATLAB Drive > graphfun.m 1 function graphfun(hfun, interval) 2N=100; 3 a=interval (1); 4 b=interval (2); 5 x = linspace (a,b,N); 6 y hfun (x); 7 plot (x,y, 'b-', [a b ],[0],r); 8 grid on; 9 end1. Find the five roots of the equation x51.13x46.28x3+4.66x2+6.05x0.85=0 using local function root=myroot ( fun, interval, tolerance) that calculates a single root within the given interval, for example [a, b], and given tolerance using bisection method. All roots are located inside the interval [3,3], but you may have to find the bracketing interval for each root using graphfun() function. After you determine the five intervals, write the scripts that calculates and displays all five roots with tolerance =0.001..