What change should be made to the sentence when editing for correct comma usage?

Kayla who just graduated from high school wants to attend the University of Houston.
Select one:

1.Kayla, who just graduated from high school, wants to attend the University of Houston.

2.No change necessary.

3.Kayla who just graduated from high school, wants to attend the University of Houston.

4.Kayla, who just graduated from high school wants to attend the University of Houston.