$1.$ Declare a double variable called total$2.$ Declare a double variable called gallons$3.$ Declare a char variable called payment$\_$type$4.$ Declare a double variable called cost.Initialize this value to $2\mathrm{.}555.$ Declare a bool variable called authorized. Initialize this value to false$\mathrm{.}6.$ Ask the user the type of payment that will be made. Use the payment$\_$type variable to receive this user input$\mathrm{.}7.$ If the user enters a $\text{'}$c$\text{'},$ it will be a credit card payment$1.$ Ask the user to enter a zipcode $($you will have to create a variable to store the value of the zipcode that the user enters; you decide what data type is appropriate$)2.$ Write a nested$-$if statement and check that the value of the zipcode entered is $93301.$ If the zipcode entered is correct, set authorized to true$\mathrm{.}8.$ If the user enters a $\text{'}$d$\text{'},$ it will be a debit card payment$\mathrm{.}1.$ Ask the user to enter a PIN $($You will have to create a variable to store the value of the PIN that the user enters; you decide what data type is appropriate$)2.$ Write a nested$-$if statement and check that the value of the PIN entered is $1234.$ If the PIN entered is correct, set authorized to true and change the value of cost to $2\mathrm{.}35\mathrm{.}9.$ If authorized is true, only then will you do the following:$1.$ Ask the user how many gallons are being purchased. User will enter a numeric amount. Use gallons variable to hold this amount$\mathrm{.}2.$ Calculate the appropriate total of the purchase depending on the payment type. Use the total variable to calculate the total amount.Additionally, you will need to add $0\mathrm{.}35$ to the total cost for debit card purchases$\mathrm{.}3.$ Display the cost of the purchase to the user$\mathrm{.}10.$ Add an else block after checking if authorized is true. In this section, show an appropriate message indicating an invalid PIN or ZIP code In C$++$ code