Blending Options-Gradient Overlay

Gradient’s parameters.

Blending Options-Stroke

Applying the same instrument , make another circle with the shown parameters next image.

Blending Options-Gradient Overlay

Gradient’s parameters.

Apply the last instrument to insert one more circle with the sizes demonstrated below.

Blending Options-Gradient Overlay

Gradient’s parameters.

Make the same way a circle colored in black.