Write Java code (for the methods only) that implements the method with the same signature for each class with the following details: [06 Marks] a. Calculates the commission earned by the dealer. A dealer charges 1% commission each to the buyer and seller on sale price of the car. b. The profit or loss for the seller. A seller earns profit (incurs loss) computed as the difference between the sale and purchase price of the car. Sales Tax is deducted at the rate of 17% on the profit earned. No sales tax is charged in case of loss. The method should display an appropriate message accordingly. c. The total amount paid by the buyer.