A normograph enable the analyst to select an organic modifier/water mixture that has approximately the same mobile phase strength as the original eluent mixture. Use the following normograph to identify: a. The methanol/water percent ratio used for this laboratory b. The equivalent acetonitrile/water percent ratio. c. The equivalent tetrahydrofuran/water percent ratio. Make sure to place the marker at the corresponding percent composition value marked by the scaled line. Your marker shall be place at the center of the line that correspond to that scale. 0 10 20 30 40 50 60 70 80 90 100 ACN/H20 0 20 40 60 80 100 MeOH/H20 0 10 20 30 40 50 60 70 80 90 100 THF/H2O 0 10 20 23 25 30 31 35 40 50 60 70 80 90 100