A classmate asks you to check their answer to this problem:

Simplify: a^3b^5a^2b^-3
They got a^6b-15
as their final answer. Are they correct?

Responses

Yes, this is the correct answer.
Yes, this is the correct answer.

No, there should not be negative exponents. The final answer should be

No, there should not be negative exponents. The final answer should be the fraction with numerator A to the 6th power and denominator b to the 15th power

No, the answer is not correct. When the bases are being multiplied, you need to add the exponents.
No, the answer is not correct. When the bases are being multiplied, you need to add the exponents.

No, the answer is not correct. When the bases are being multiplied, you need to multiply the exponents.

No, the answer is not correct. When the bases are being multiplied, you need to add the exponents.