Determine the interest on the following notes: (Round Intermediate calculations and answers to 2 decimal places, s 52.75) $2,000 at 6% for 90 days $900 at 9% for 5 months (a) $ (b) S (0) $3,000 at 8% for 60 days $ (d) $1,600 at 7% for 6 months 5