A 200-W infrared laser emits photons with a wavelength of 2.0 106 m, and a 200-W

Question:

A 200-W infrared laser emits photons with a wavelength of 2.0 × 10−6 m, and a 200-W ultraviolet light emits photons with a wavelength of 7.0 × 10−8 m.
(a) Which has greater energy, a single infrared photon or a single ultraviolet photon?
(b) What is the energy of a single infrared photon and the energy of a single ultraviolet photon?
(c) How many photons of each kind are emitted per second?