There is a tree in the middle of your front yard and you take pictures of a squirrell as it runs around the tree. When you take the rst picture, the squirrell is 12 m away from the tree in the direction 30° N of E moving with a speed of 1.8 m/s due east. Twelve seconds later, you take a second picture and the squirrell is 7.5 m away from the tree in the direction 15° E of S moving due north with a speed of 1.5 m/s. After an additional 15 seconds, you take a third picture when the squirrell is 9.5 m away from the tree in the direction 25° W of S moving with a speed of 2.5 m/s due west.
(a) What is the displacement of the squirrell between the rst and second pictures?
(b) What is the average velocity of the squirrell between the second and third pictures?
(c) What is the average acceleration of the squirrell between the rst and third pictures?