A robot has been programmed to move about a field and pull up weeds around lettuce plants. A prototype of the lettuce field is 100 feet long and 100 feet wide.

The robot is at position (9, 28) at time t = 3 seconds and at position (15, 36) at t = 7 seconds. The robot moves in a straight line at
a constant rate of speed.

Part A
Where did the robot start?

At t = 0 seconds, the robot started at position?

Part B
At what location will the robot hit the edge of the prototype field?