These are my notes from when i did this in my class, hope that helped
Explanation:
Wien’s Law:

The law states that the wavelength at which black body emits maximum heat is inversely proportional to the temperature of the body in Kelvins.

1) Walls at 300 K


2) Ice water at 273 K :


3) Hot water at 373 K :


4)Skin at 310 K:


5)An incandescent light bulb at 3000 K

