Problem Solving Physics - Quantum Physics, Photons 3

Worked solution for another question from quantum physics, a question on photons. You can access the Photons questions as a PDF here:
physicshq.wixsite.com/alevelp...
Download the question sheet and attempt the questions yourself, then watch this video to see how you did. These questions are A-level physics standard.
Relevant concepts: photoelectric effect, kinetic energy, photoelectrons, wave-particle duality, and electromagnetic radiation.
More questions and answers to come…
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[@varun2247]

Can you please help me with video solution to this problem? 🙏🙏 . Kindly help me sir. I request you please help