Tanna Corporation is considering three investment projects: O, P, and Q. Project O would require an investment of $38,000, Project P of $49,000, and Project Q of $91,000. No other cash outflows would be involved. The present value of the cash inflows would be $42,180 for Project O, $53,900 for Project P, and $91,910 for Project Q. Rank the projects according to the profitability index, from most profitable to least profitable.