4. The annual interest rate is 15%. The balance on day 1 of the billing cycle was $12,000. A payment was made on the 3rd day. what is the interest for the month? 5. The annual interest rate is 19% The balance on day 1 of the billing cycle was $25,000. A payment of $1,000 was made on the 6th day. Another payment of $3,000 was made on the 21st day. What is the interest for the month