Answer: a^6b^3
Reason:
The 'a' terms are a^8 and a^6. We go for the smallest exponent when forming the GCF. Go for the largest exponent when finding the LCM.
The b terms are b^6 and b^3. The smaller exponent is b^3, which is also part of the GCF
We have a^6 and b^3 combine to form a^6b^3