Resolved Question: how long will it take to fit a sample size?

a sample size has measurements of 34-24-24 (or at least a 24 inch waist as I will end up with smaller hips/boobs)
ATM I am 35-29-36.
A sample size is the sample clothing size used in modelling. It is generally a 2-4 and made to fit someone who is 5'9.

I am going to be eating 1400 calories, and for the next 2-3 months, every week I will be doing 2 kickboxing lessons, a tap dance lesson and a breakdancing lesson or contemporary dance lesson. I might go to one soccer and basketball lesson each week and I am starting to run (no more than 5m on first day, I won't last longer lol) and in about 2 months I will be starting soccer training (2x week) and might do athletics (2x) and cross country (aka track, 2x a week).

About how long will it take to lose 5" off my waist? Would I do it by the end of July? thanks x

And since I am 14 would I possible grow another inch? (i'm 5'8") I do like no sport pretty much and my mum says i could grow another inch, because of the physical activity.

BTW my mother knows and she's OK with it. I just want to know how long it'd take.

I did ask earlier but I only got those stupid wu-yi tea answers and i am not going to buy any of those links or click them or anything.
dude, marissa miller has a 6 pack and she's hell skinny and has like a 23-24" waist(i don't want to look like her though :| i dont want a 6 pack. the only thing that'd give me abs is kickboxing)