Mathematics homework help

Write a java applet for costco gas station. The applet will first ask you whether you are a costco customer, then the grade of gas you want to use: grade 87, 89, or 91. Next, the applet will ask for the gallon of gas customer will need, based on the all these input, you applet will calculate how much the customer need to pay, and display a thank you note.

 
"Our Prices Start at $11.99. As Our First Client, Use Coupon Code GET15 to claim 15% Discount This Month!!"

"Our Prices Start at $11.99. As Our First Client, Use Coupon Code GET15 to claim 15% Discount This Month!!":

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