I found the first answer from someone else but it didn't show the work (please show the work for that one)

i do need help on the third questin please show work as well

Marigold Inc. has decided to purchase equipment from Central Michigan Industries on January 2, 2025, to expand its production capacity to meet customers' demand for its product. Marigold issues an $640,000, 5-year, zero-interest-bearing note to Central Michigan for the new equipment when the prevailing market rate of interest for obligations of this nature is 12%. The company will pay off the note in five $128,000 installments due at the end of each year over the life of the note.