Question

Which of the following types of stars is the coolest?

Answer 1

and also: Which of the following types of stars started out on the main sequence with the largest initial mass?

using the same picture.
I'm so confused on these questions that it's making me want to cry.

Answer 2

the graph with the distribution at longest wavelengths would be the coolest, since E is inversely proportional to wavelength. Longer wavelength -> lower energy.

Answer 3

for the 2nd, i don't know what they're talking bout, what sequence?

Answer 4

the 2nd one is NOT b