Acharter airline finds that on its saturday flights from philadelphia to london, all 120 seats will be sold if the ticket price is $200. however, for each $3 increase in ticket price, the number of seats sold decreases by one.(a) find a formula for the number of seats sold if the ticket price is p dollars.(b) over a certain period, the number of seats sold for this flight ranged between 90 and 115. what was the corresponding range of ticket prices?