The pictures below show the wavelengths and intensities of electromagnetic radiations emitted by three stars, Star 1, Star 2, and Star 3.

Which of these statements is correct about the color of the three stars?
a.) Star 2 is white in color.
b.) Star 2 is yellow in color.
c.) Star 1 and Star 3 are yellow in color.
d.) Star 1 and Star 3 are white in color.