exam task c++ for school

i need help from you, i need from you to do this exam task for me please... Exem task is: Make this in C++ Create abstract class Bill which has a clear virtual function returnValue.From her perform classes Ten,Twenty,Hundred which they represent bills of 10,20 and 100. After that create class ATM which contains array of bills(in diffrent denominations).Create functions: • for input bills in ATM(increasing financial situation) • for determination current financial situation in ATM(adding value of all bills) • for raising listed amount of money(return bills on the basis of available denominations,if is not possible to pay off,return closest lower sum)