Zumbox allows: A. messages to get through social media sites without the threat of
viruses.
B. people to have conversations with celebrities about world issues
at any time.
c. all mail to be sent and delivered online to any streeliaddress in
paperless form.
D. individual citizens to instantly send messages of concern to the
U. S. president

Assume the existence of a bankaccount class. define a derived class, savingsaccount that contains two instance variables: the first a double, named interestrate, and the second an integer named interesttype. the value of the interesttype variable can be 1 for simple interest and 2 for compound interest. there is also a constructor that accepts two parameters: a double that is used to initialize the interestrate variable, and a string that you may assume will contain either "simple", or "compound", and which should be used to initialize the interesttype variable appropriately. there should also be a pair of functions getinterestrate and getinteresttype that return the values of the corresponding data members (as double and int respectively).