Declare, create, and initialize a three-dimensional array of ints, x, that has 3 rows, each of which has 2 columns where each column is an array 4 ints. the elements in the first row are all 5, in the second row are all 7, and in the third row the first column is all 8 and the second column is 30, 31, 32, and 33.

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).