Appraise the 3 projects illustrated below on the table using criteria of expected value, maximin, maximax and minimax regret. The probability of 4% interest rate is 0.3, of 6% is 0.4 and of 8% is 0.3.

Project 4% 6% 8%

A 100 80 70

B 90 85 75

C 120 60 40

What would be the value of perfect information about the interest rate?