As Russ runs, his knee joint passes through the following vertical positions (meters): Frame 1: 0.083 Frame 2: 0.196 Frame 3: 0.244 Frame 4: 0.362 Frame 5: 0.498 The data were collected at a frequency of 100Hz (i.e. 100 frames per second - think about how this can be used to determine the time). What was the vertical acceleration of his knee joint at the third time point.

Round your answer to the nearest tenth (i.e. 1 decimal place) and DO NOT include units.