Is this an okay time 100m sprint.......?

okay im in 7th grade. first year in track. our coach was timing us for 400m 300m 200m and 100m but i forgot all the times besides the 100m. well we did the 400m 300m 200m back to back before the 100m (i was very tired) so i know i could make my time way way way better. plus i didn't have my spikes with me :'( shame on me.

100meters- 15.00sec exactly