please answer question d) only urgent. do in netbean JAVA

(c) a The two roots of a quadratic equation ar' + bx + c = 0 can be obtained using the following formula: -b + Vb2 - 4ac -b - Vb2 - 4ac and r2 = 2a rl= 2a b- fac is called the discriminant of the quadratic equation. If it is positive, the equation has two real roots. If it is zero, the equation has one root. If it is negative, the equation has no real roots. Write a program that prompts the user to enter values for a, b, and c and displays the result based on the discriminant. If the discriminant is positive, display two roots. If the discriminant is 0. display one root. Otherwise, display "The equation has no real roots". Following Figure Q1(c) shows an example of the output: Enter a, b, c 1.031 The equation has two roots -0.381966 and -2.61803 Enter Enter Enter a, b, c 1 2.01 The equation has one root - 1 Enter a, b, c: 123 The equation has no real roots Figure Q1(e): Example of the Output Enter [10 marks) (d) Input validation is a process of inspecting data that is given to the program as input and determining whether it is valid. Propose how to make the above program in question QI(C) keep looping based on the input validation. [5 marks)