Craig, Florian, and Wilson are running a long-distance race. Their coach tracks each runner’s progress by recording a positive number if the runner is past the checkpoint, a negative number if the runner has not reached the checkpoint, and a zero if the runner is exactly at the checkpoint. After $90$ minutes have passed, their coach records the progress of the three runners in the table below. Runner Progress Relative to the Checkpoint (in miles) Craig $-3$ Florian $2.5$ Wilson $-2.25$ Part A Who is leading the race? Who is in second place? Who is in third place? Justify your answers.

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?