(a) design and implement a program that converts a sum of money to a different currency. the amount of money to be converted, and the exchange rate, are entered by the user. the program should have separate methods for: • obtaining the sum of money from the user; • obtaining the exchange rate from the user; • making the conversion; • displaying the result. (b) adapt the above program so that after the result is displayed the user is asked if he or she wishes to convert another sum of money. the program continues in this way until the user chooses to quit. using java