a. Use the appropriate formula to determine the periodic deposit. b. How much of the financial goal comes from deposits and how much comes from interest? Time Periodic Deposit $? at the end of each month Rate 4.5% compounded monthly 15 years Financial Goal $180,000 Click the icon to view some finance formulas. . a. The periodic deposit is $0. (Do not round until the final answer. Then round up to the nearest dollar as needed.) b. $of the $180,000 comes from deposits and $ comes from interest. (Use the answer from part (a) to find these answers. Round to the nearest dollar as needed.)