Would anyone be able to help identify the proper investment opportunity ranking given the information below?

$4 million $8 million $7 million $6 million 1,11, 111, IV II, III, Iv, I III, 11, IV, I IV, III, II, I Annual CF $1.1 million $2.8 million $2.1 million $2.0 million P_roject Life 5 years 4 years 5 years 4 years