Ship A is 15 miles east of O and moving west at 20 miles/hour. Ship B is 60 miles south of O and moving north at 15 miles/hour. Give simplified, exact answers.

a. (-15 , mi/h) and (60 , mi/h)
b. (15 , mi/h) and (-60 , mi/h)
c. (-20 , mi/h) and (15 , mi/h)
d. (20 , mi/h) and (-15 , mi/h)