Quantum Mechanics Problem No. 1

Quantum Mechanics (Problem No. 1) The temperature of an electric heating element is 150°C. At what wavelength does the radiation emitted from the heating element reach its peak? Reference PHYSICS for Scientists and Engineers with Modern Physics Raymond A. Serway John W. Jewett, Jr. Cengage 9th Edition (2014) Ch. No. 40 (Introduction to Quantum Physics) Exercise No. 40.1