Which of the following are valid c++ identifiers?

new-assignment

a._nextquiz

b. 3rdproject

c.$twohundred

d. cpp_project

e. oneinchis2.2centimeters

f. weekly quiz

g. jack'shomework

h. first#

i. overpayment

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).