Please help me with this assignment ... It's due by the end of class today and I really need the answer for it. If you know the answer, can you please explain it in depth as well? Thank you.

Question: Figure A below was dilated to form Figure B. Determine if this was an expansion or contraction, and find the value of the missing sides .

Triangle A: 7, 8, 10 (smaller)
Triangle B: 14, n, m (bigger)
m= ___
n=
Please help me find the answers for m and n. This is crucial to my grade and I already have a 100%.