Please help me with this question.

1. The escape velocity from Earth is 4 x 104 km/h. What would be the percent decrease in length of a 95.2 m long spacecraft traveling at that speed? 2. At what speed do the relativistic formulas for length and time intervals differ from the clas- sical values by 1%? 3. (i) What will be the mean lifetime of a muon as measured in the laboratory if it is traveling at v - 0.6c with respect to the laboratory? A muon's mean lifetime at rest is 2.20 us. (12) How far does a muon travel in the laboratory, on average, before decaying