e) The mass of a typical cosmic ray, such as a muon, is 206 times the mass of an electron, which
can also be written as $106\text{MeV}/\text{c}^2$. If a muon has an energy of $10\text{GeV}$, what is its momentum?
You may write your answer in $\text{GeV}/\text{c}$ or SI units if you wish. [3pts]