A muon, or meson, has the same charge as an electron, but is 207 times as

Question:

A muon, or μ meson, has the same charge as an electron, but is 207 times as massive.
(a) Compared with electron–positron pair production, the pair production of a muon and an antimuon requires a photon of (1) more, (2) the same amount of, (3) less energy. Why?
(b) What would be the minimum energy and frequency for such a photon?