Plutons. It is 100% correct.
here is the definition of a pluton to prove my point:
<span>In geology, a pluton is a body of intrusive igneous rock, called a plutonic rock. It is crystallized from magma slowly cooling below the surface of the Earth. </span>
The nucleolus disappears. Centrioles begin moving to opposite ends of the cell and fibers extend from the centromeres. Some fibers cross the cell to form the mitotic spindle. The nuclear membrane dissolves, marking the beginning of prometaphase.
well if she has 15 now then you add 3 to 2 which is 5 then add that to the 15 so you get 20 in total then minus th3 6 she made today you get 14 divided by 2 which is 7 she made 7 yesterday and 13 today which is 20 so the answer is 7