Create a class called PetrolPurchase to represent information about the petrol you purchase. The class should include five pieces of information in the form of instance variables $-$ the station location, the quantity of purchase in litres, the type of petrol, the price per litre and the percentage of discount.

Your class should have a constructor that initiates the five instance variables, accessor methods, mutator methods, payment method, a str$-$method that returns the information of instance variable and a repr$-$method to indicate how an object can be created.

The following shows the interactions:

Enter the station: Bukit Timah

Enter quantities in litres: $30$

Enter type of petrol: Super $98$

Enter price of petrol: $3\mathrm{.}50$

Enter discount: $25$

The system displays the following summary purchased:

Summary of purchase

Station: Bukit Timah

Quantity: $30\mathrm{.}00$

Petrol type: Super $98$

Unit price: $3\mathrm{.}50$

Discount: $25\mathrm{.}00\%$

Total cost: $$105\mathrm{.}00$

Total discount $(25\mathrm{.}00\%)$: $ $26\mathrm{.}25$

Final payment: $ $78\mathrm{.}75$

The customer decides to add in some for more litres of petrol:

Additional quantity: $40$

Final Summary of purchase

Station: Bukit Timah

Quantity: $70\mathrm{.}00$

Petrol type: Super $98$

Unit price: $3\mathrm{.}50$

Discount: $25\mathrm{.}00\%$

Total cost: $$245\mathrm{.}00$

Total discount $(25\mathrm{.}00\%)$: $ $61\mathrm{.}25$

Final payment: $ $183\mathrm{.}75$

Finally the call of $\_$repr$\_$ object was constructed:

function to describe how the final

The object was constructed according to:

PetrolPurchase $("$Bukit Timah", $70\mathrm{.}0,$ "Super $98",3\mathrm{.}5,25\mathrm{.}0)$