C++ Use abstract classes and pure virtual functions to design classes to manipulate savings account, Suppose that the bank offers two types of savings accounts: one that has no minimum balance and a lower interest rate and another that requires a minimum balance and has a higher interest rate.

this is what i have so far:

//savingsAccount.h

//2 classes needed

Class SavingsAccount: public Account

{

Public :

SavingsAccount(string, string, double,);

Double getInterestRate() const;

Private :

Double interestRate

};

//2^nd file

Class MimimunBalanceSavingsAccount: public SavingsAccount

{

Public: minimumBalanceSavingsAccount(string, string, double);

Private:

doubleminimumBalance;

};

MinimumBalanceSavingsAccount::MinimumBalanceSavings (string owner, string accNum,double balance):

{

interestRate=0.02

}

//savingsAccount.cpp

SavingsAccount::SavingsAccount(string owner,string accountnumber, doublebalance)

{

//assighndatamembers

interestRate=0.01