I Need Help Solving Each Of These Questions Step By Step Please Help A Laser Pro

I need help solving each of these questions STEP BY STEP. Please help!

A laser produces 20.0 mW of red light. In 1.00 hr, the laser emits 2.29 × 1020 photons. What is the wavelength of the laser?

An electron in the n = 6 level of the hydrogen atom relaxes to a lower energy level, emitting light of λ = 93.8 nm. Find the principal level to which the electron relaxed.

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