The two people in figure 1 each exert a force on the bicycle. if the forces are f1=10n toward the right and f2=20n toward the left, how will they affect the motion of the bicycle

Aperson walking 1 mile everyday for exercise, leaving her front porch at 9: 00 am and returning to her front porch at 9: 25 am. what is the total displacement of her daily walk? a) 1 mileb) 0c) 25 minutes d) none of the above