The following graphs show the position of four objects moving along the x-axis as a function of time, 0 s t s 6 . The questions below refer only to this time interval. Time is measured in seconds. Object A Object B Object C Object D (a) Which object ends up farthest from its starting point? ---Select--- v (b) Which object, if any, has an average velocity of zero over the first 6 seconds? -Select--- v (c) Which object, if any, has zero acceleration throughout the first 6 seconds? ---Select-- v (d) Which object, if any, has a decreasing velocity throughout the first 6 seconds? ---Select--- v