The two naturally occurring isotopes of bromine are 81 Br (80.916 amu. 49.31%) and 79 Br (78.918 amu, 50.69%). The two naturally occurring isotopes of chlorine are 37 CI (36.966 amu. 24.23%) and 3CI (34.969 amu, 75.77%). Bromine and chlorine combine to form bromine monochloride, BrCl. Part A How many peaks will be present in a mass spectrum for BrCl? Part B What are the masses of the four different BrCl molecules? Express the masses in atomic mass units using six significant figures, in decreasing numeric order (highest to lowest), separated by commas.