What is the average atomic mass of an element with two naturally occurring isotopes that have the following masses and percent abundances? Isotope 1, 41.02 amu, 72.00% Isotope 2, 42.98 amu, 28.00%.

a) 41.82 amu
b) 42.56 amu
c) 41.36 amu
d) 41.14 amu