$(20$ pts$)$ You are given the following class which describes one delivery of recyclables to our center $($not all

functions are included$)$:

class CDelivery

$\{$

public:

virtual double Payment$()\{$ return mPounds $*$ mRecyclable$->$PricePerPound$()$; $\}$

virtual double GetPounds$()\{$ return mPounds; $\}$

virtual bool IsPremium$()\{$return false; $\}$

private:

CRecyclable $*$mRecyclable $=$ nullptr;

$\}$;

double mPounds;

Create a new C$++$ class CPremiumDelivery derived from CDelivery that has the member variable: double

mPremium. Create three functions: Payment, GetTons, and IsPremium. You are not allowed to change CDelivery

in any way.