Order the steps that cause a shoot to bend toward a light so

Order the steps that cause a shoot to bend toward a light source.Starting with light shines on one side of a shoot and ending bends towards light source. Photoreceptors in the shoot sense the location of the lightThe concentration of auxin increases on the shaded side of the plant.Cells on the shaded side of the shoot elongateAuxin activates proton pumps, decreasing the pH of cells on the shaded side of the shoot.Acidification breaks hydrogen bonds in the cell wall and activates expansins.