Magnesium has three naturally occurring isotopes, ²⁴Mg (isotopic mass = 23.9850 amu, abundance = 78.99%), ²⁵Mg (isotopic mass = 24.9858 amu, abundance = 10.00%), and ²⁶Mg.
(isotopic mass 5 25.9826 amu, abundance 5 11.01%). Calculate the atomic mass of magnesium.