Tori Chang has three chores to finish over the coming weekend: planting flowers, cleaning the house, and babysitting her neighbor's toddler.She has 20 hours to allow for these activities.She decides to spend three times as much time babysitting as cleaning and 1 hour less planting flowers as babysitting.Find how much time can be spent doing each activity.

a) babysitting

b) cleaning

c) planting flowers