urgent pls

PROJECT EXPENDITURE EXPENDITURE EXPENDITURE RETURN (MILLION $) FOR (MILLION $) FOR (MILLION $) FOR (MILLION $) YEAR 1 YEAR 2 YEAR 3 PROJECT 1 3 4 2 15 PROJECT 2 5 LO 1 6 20 PROJECT 3 7 8 3 25 AVAILABILITY 10 10 10 (MILLION $) 1. What is the return in M$ if PROJECT 1 and PROJECT 3 were selected? 2. What is the optimal return in M$? 3. Which of the following is correct about the nature of this optimization