Please help me with these problems. I have tried to answer the questions but the are wrong.

a. Interest Computations Determine the interest on the following notes. Round your answers to the nearest cent. $58,940 at 6 percent for 60 days. $ b. 7072.8 $14,280 at 9 percent for 30 days. $ c. $30,600 at 12 percent for 60 days. $ d. $21,070 at 10 percent for 90 days. $ e. $46,360 at 15 percent for 120 days. $ 1. Short Exercise 10-7 (Algorithmic) Present Value Calculations Note: The following table 1 and table 2 on present values may be used where appropriate to solve this problem: Round answers to the nearest dollar. Find the present value of a single payment of $23,600 at 6 percent for 12 years. $ 2. Find the present value of 12 annual payments of $2,000 at 6 percent. $ 3. Find the present value of a single payment of $5,000 at 9 percent for five years. $ 4. Find the present value of five annual payments of $5,000 at 9 percent. $ Short-Term Liquidity Ratios Wellman Company has cash of $80,000, net accounts receivable of $180,000, and net sales of $1,440,000. Last year's net accounts receivable were $140,000. Compute the following ratios: (Round days' sales uncollected answer to nearest whole day. Assume 365 days in a year.) a. Receivables turnover: times b. Days' sales uncollected: days