A source of red light, a source of green light, and a source of blue light each

Question:

A source of red light, a source of green light, and a source of blue light each produce beams of light with the same power. Rank these sources in order of increasing
(a) Wavelength of light,
(b) Frequency of light, and
(c) Number of photons emitted per second. Indicate ties where appropriate?