questioner wrote:

Why is the sum of the radii 5? Which radii are you refering to? Thanks.

Statement (1) defines a circle with the radius 2 and (0, 4) as its center.

So the point A can be any point on the red circle.

Statement (2) defines a circle with the radius 3 and (0, 0) as its center.

So the point A can be any point on the blue circle.

When we combine the two statements we get

So A can be any of the two green points (intersection of the circles). Thus even combined the statements are NOT sufficient.