It probably won't. You have to be very careful on Vlcds when it comes to exercise
Exercise on a VLCD isn't like on other diets. You're on the minimum cals you can be. It'll help tone but won't make any great difference to your losses
It is possible. It really depends on your real metabolic base rate. If you can find someone locally with a MedGem device, they can test it. It's not as accurate as the full boddy tests but a lots quicker and cheaper.
Make sure you factor in refeed time, and try it. Good luck,