Draw the free body diagrams of the bus with its passengers. b) Determine if/how the number of passengers (????) on the bus affects whether the bus can move up or down the hill in a controlled manner at constant velocity under the following road conditions: Dry road: ???? = 0.7 ?????? ???? = 0.6 Wet road: ???? = 0.55 ?????? ???? = 0.4 Icy road: ???? = 0.15 ?????? ???? = 0.1 Hints: i. You may need to find the proportional loading of each wheel ii. Recall that friction is a reactive force where F =sN is the maximum threshold for no slip iii. A negative ???? is not necessarily incorrect. Please think about what it means. c) Describe in your own words what is the meaning of the numbers found, according to the situatio