Write a program checkLuminance that will input red, green, and blue values, and compute the luminance using the weighted average (as below). But then print out a warning to the user based on the computed luminance:

• If the luminance is less than 10, “That’s going to be awfully dark.”

• If the luminance is between 50 and 200, “Looks like a good range.”

• Over 250, “That’s going to be nearly white!”