If carbon atom is available in the form of ,say three isotopes ¹²C6,¹³C6,¹⁴C6 calculate the overage atomic mass of carbon atom if the abundance is 98.8%,1.17% and 0.1% for ¹²C,¹³C,¹⁴C respectively.. pls anwer my question very important

If carbon atom is available in the form of ,say three isotopes ¹²C6,

1.	If carbon atom is available in the form of ,say three isotopes ¹²C6,¹³C6,¹⁴C6 calculate the overage atomic mass of carbon atom if the abundance is 98.8%,1.17% and 0.1% for ¹²C,¹³C,¹⁴C respectively.. pls anwer my question very important
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