Projecting finishing times based on workouts with long recoveries is difficult unless you know a lot about the athlete in question, though the problem is mitigated someone because 3 minutes per interval is a decent length.
This would be an appropriate workout for someone who runs a 19 flat 5k. It doesn't mean that you actually can, though, as in my experience VO2Max intervals tend to overestimate the racing ability of people who run 5ks in over 16 minutes.
The charts also say that this is the right workout for someone who runs a 5-miler at 6:20 pace. Since almost everyone under-performs as they go up in distance, and as this will almost certainly be a road race rather than a track race, aim to hold 6:20 pace for the entire four-mile race, which would bring you in at 25:20--solidly ahead of where you were last year.