Solve the following problem:
Problem: A butterfly flies from the top of a tree in the center of a garden to rest on top of a red flower at the garden's edge. The tree is 7.0m taller than the flower, and the garden is 12m wide.
Part A: Determine the magnitude of the butterfly's displacement.
Please show the work for the calculation so I can understand what I'm doing. Thanks! Express your answer using two significant figures.