Solve the following question given below:

Question: A telescope can be used to enlarge the diameter of a laser beam and limit diffraction spreading. The laser beam is sent through the telescope in opposite the normal direction and can then be projected onto a satellite or the Moon. If this is done with the Mount Wilson telescope, producing a 2.57-m diameter beam of 524-nm light,

Question 1: What is the minimum angular spread of the beam?

Please show how you obtained the answer.