Following is a template for bankaccount class: public class bankaccount { private string name; private double balance; // // your code goes here } add the following method to the bankaccount class: public string tostring() your method should return a string that contains the account's name and balance separated by a comma and space. for example, if an account object named benben has the name "benson" and a balance of 17.25, the call of benson. tostring() should return: benson, $17.25 there are some special cases you should handle. if the balance is negative, put the - sign before the dollar sign. also, always display the cents as a two-digit number. for example, if the same object had a balance of -17.5, your method should return