Compute the correct answer of the given questions
Question 1- What is the present peak wavelength of the cosmic microwave background?
Question 2- Calculate the present size of the universe relative to its size when the radiation background peaked
Part 1- in the infrared, at 10 nm.
Part 2- In the ultraviolet, at 100 nm.
Part 3- In the gamma-ray region of the spectrum, at 1 nm.
I want experts help to evaluate the present peak wavelength of the cosmic microwave.