What is the average atomic mass of the element with the isotopic abundances shown Use the correct number of significant figures in your answer. Do not use scientific notation?

To calculate the average Atomic Mass, multiply the mass of each isotope by its relative abundance (as a decimal) and sum these values. For example, if you have isotopes with masses of 10 amu (abundance 0.2) and 11 amu (abundance 0.8), the average atomic mass would be (10 * 0.2) + (11 * 0.8) = 10.8 amu. Ensure your final answer reflects the correct number of significant figures based on the provided data.