e. A loan of $4000 is to be repaid by 3 equal payments due in 4, 8, and 12 months respectively. Determine the size of the equal payments at 12% with a focal date today.

f. A loan of $1500 taken out on March 1 requires equal payments on April 30, June 20 and August 10 and a final payment of $400 on September 30. If the focal date is September 30, what is the size of the equal payments at 13%?