Suppose you are writing software for a radio station that manages its playlists. the program will generate candidate playlists from a record library automatically and station personnel can then check and modify them. disc jockeys must also be able to change playlists when they are used because what is actually played is often different from what is planned. the playlists are then used to generate reports for paying royalties. you must decide what sort of data structure to use to store playlists. make a choice and write a design rationale. your rationale should explain the factors that went into your decision, the design alternatives you considered, your evaluation of design decisions, and the reasoning for your final choice.

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).