PLEASE HELP ME ITS FOR MY TEST SO PLEASE NO WRONG ANSWERS
Joanne simplified these exponential expressions as single powers.

(5^3)(5^6)=5^{18}( 5 3 ) ( 5 6 ) = 5 18


(3^4)(3^7)=3^{28}( 3 4 ) ( 3 7 ) = 3 28


(y^2)(y^5)=y^{10}( y 2 ) ( y 5 ) = y 10

What mistake did Joanne make?

Group of answer choices

Joanne used the sum of the exponents as the exponent of the single term instead of using the quotient.

Joanne used the quotient of the exponents as the exponent of the single term instead of using the product.

Joanne used the product of the exponents as the exponents of the single term instead of using the sum.

Joanne used the difference of the exponents as the exponent of the single term instead of using the sum.