The ratio of the distance you calculated in part and the time you calculated in part is a speed. Calculate this speed; what do you notice?
a. The speed of the muon in earth's frame of reference is greater than earth's surface speed in muon's frame of reference because of length contraction.
b. The speed of the muon in earth's frame of reference is the same as the earth's surface speed in muon's frame of reference.
c. The speed of the muon in earth's frame of reference is lower than earth's surface speed in muon's frame of reference because of time dilation.