3. The World Solar Challenge in 1987 was the first car race in which all the vehicles were solar powered. The winner was the GM Sunraycer, which had a mass of 177.4 kg, not counting the driver's mass. Assume that the driver had a mass of 61.5 kg, so that the total momentum of the car and driver had a magnitude of 4.416 x 10' kg. m/s. What was the car's speed in m/s and km/h?4. The current holder of the men's world record for running 200 m is Michael Johnson, who in 1996 ran 200.0 m in 19.32 s. Johnson's mass at the time of his record-breaking run was about 77 kg. What was the magnitude of his momentum at his average speed? 5. The brightest, hottest, and most massive stars (over 10 times as massive as the sun) are the brilliant blue stars designated as spectral class O. If a class O star moves with a speed of 255 km/s and has a momentum of 8.62 x 10* kg.m/s, what is the star's mass