In MATLAB

Consider the quadratic equation ax2 + bx +c=0 (a) Create a function file named Discriminant that has input variables a, b, and c and returns the variable D, which is the discriminant of the quadratic equation. (b) Create a function file named QuadRoots that has input of a, b, and D and returns two variables xl and x2, which are the two roots of the quadratic equation. (c) Create a script file named QuadraticEqnRoots that finds the discriminant and the roots of the equation 4x2 19x + 21 = 0 by calling the functions Discriminant and QuadRoots. (Hint: Note that the equa- tion gives you the values of a, b, and c that you will need to define in QuadraticE- qn Roots.)