the foot operated sewing machine shown below has a driver pulley which is 30cm in diameter and is attached by a belt to a sewing pulley with a 5cm diameter. The sewing machine makes one stitch for each revolution of its sewing pulley. a. The driver pulley is turned easily at one revolution per second. -how many stitches does the machine make in 10 minutes? -how far would the belt travel in 10 minutes? b. if the foot pedal(driver) was replaced by an electric motor with a pulley of diamater 1.5cm, how fast would it need to turn to duplicate the same sewing rate? 2. Relevant equations I'm not sure what to put here, sorry. 3. The attempt at a solution for A, I answered: the driver makes 600 rotations per minute. 600*5= 3.000 and for the rest I have no idea how to complete because I was absent for the explanation.