Jack and Jill bought a state lottery ticket and won a $25 million price that pays the winner in 10 years ($2.5 million a year for 10 years). The 3 options they have in mind are 

a. collecting the prize each year and putting 80% in a fixed deposit account yielding 4% p.a.; 

b. collecting the prize at once from the lottery agency, which will pay them $21.32 million at one time; or 

c. selling the winning ticket to XYZ Private Capital, which will pay them an amount based on their IRR of 3.5% p.a. and a gross margin of 5%. Which of these options should Jack and Jill choose?