Exercise 1 Write a python function quad roots_1() that will calculate the real-valued roots of the quadratic equation, i.e. the values of x such that ax+bx+c= 0. The return value should be a list of two roots, according to the positive and negative roots of the quadratic formula. Your function should have four arguments: the first is the value on the horizontal axis, x, the rest are the coefficients (a,b,c) in the quadratic equation, in that order. Exercise 2 The discriminant of the quadratic equation is the value 62 4ac. What happens to your answer in Example 1 when b2 - 4ac