If camphor has M+ = 152.1201 by high resolution mass spectrometry, what is its molecular formula?

(The order of atoms should be carbon, then hydrogen, then the others in alphabetical order.)

Molecular formula:

Calculate the degree of unsaturation for this compound.

Degree of unsaturation:

I am especially curious as to how you would go about finding a molecular formula from M+ alone. Thank you in advance!!