Write a web application using php as server side scripting language. your web site sell three products which are laptop, printer and mobile phone. to simplify this application. assume each laptop is $200, printer is $100 and phone is $600.user can pay installment. the first installment will be charge today and other installment notice will send to user’s email address when they are due. the followings are the screen shots for several tests. note you mustreplace yourrealnameon the order form with your real name. your response to this order would be to calculate how much to charge to the user. the first payment is due today, and other payments if there are any will be due in the future. your application will calculate the total charge, today’s charge, number of remaining payments if there is any. send back the information with user’s names show correctly and email as the following.