We like #56. Can you switch the placement of 360 and spirometry? Also, let's delete the curve below the x-axis and make the curve above the x-axis a little bolder. Could we try a few versions with different colors for the axis for the axes and curve? Maybe orange for the axes?
Designs are looking good. For #82, could you move 360 above the Flow/Volume (i.e.. move it along the y-axis so it sits just above where the curve starts to taper off)?