URGENT PLEASE HELP
***Underline the prepositional phrase and make the word it modifies bold.
***Also, indicate whether it is an adjective or adverb phrase.

1.) Finishing the course in the fastest time is the goal.

2.) Using maps and compasses, orienteers find marked parts along the course.

please help me with this. i don't really understand it and i watched videos over it but none explained it well. tysm!​