12. On May 26, 1969, the spacecraft Apollo 10 set the record for the highest speed attained by a manned vehicle, travelling 39,897 km/h while returning from the moon. The spacecraft was moving so incredibly fast that it relied on Earth's atmosphere to slow it down as it returned to Earth. a. If instead Apollo 10 used its main thruster to slow down, which is capable of an average acceleration of 9.3 m/s while at full thrust', how much time would it take for the spacecraft to stop? Apollo 15 (similar to Apollo 10) The main thruster can be seen in the top left corner of the image. b. At full thrust, the thruster can only operate for approximately 5 minutes before it runs out of fuel. Referring to your answer in part (a), is the thruster capable of stopping the spacecraft before running out of fuel? If so, state how many seconds of fuel would remain. If not, state what speed Apollo 10 will be travelling when it runs out of fuel.