4. Decision table testing question Use a decision table testing method to deal with the following credit card example. Assume you are given software that processes a credit card based on the following constraints: If you are a customer without any credit cards, you do not receive discounts today. If you are a new customer opening a credit card account, you will get 20% discount on all your purchases today If you are an existing customer with a loyalty card, you can get a 15% discount. If you are purchasing cost is over $100 today, you receive another 15% discount. If you have a coupon, you get 5% off today. However, a coupon can't be used with any other discounts Discount amounts are added, if applicable. . . a) b) List your decision table to present these conditions and rules, as well as actions. Based on the derived decision table, define a set of adequate test cases