The element X has two naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is amu. 
Definitions:
Financial Performance
A measure of how well a firm is using its assets to generate earnings.
Power-Influence Approach
A theory in leadership emphasizing the tactical use of power and influence by leaders to direct or change the behavior of followers towards desired outcomes.
Power
Refers to the capacity or ability to direct or influence the behavior of others or the course of events.
Influence Tactics
Strategies or methods used by individuals to persuade or direct others' behaviors and decision-making in a desired manner.
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