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RE 4. Given the following gel shown on the right, calculate the approximate molecular weight of the bands using the molecular weights of the standards. a. Calculate the Rf value of the standards and the unknown. The length of the gel is 8.4cm. Distance Bands 1 2 Log MW Travelled (kDa) (cm) 205 205 1.0 4.2 cm 116 3.1 116 97 3.8 97 66 4.9 66 8.4 cm 45 7.9 Unknown 4.2 45 b. Submit a plot of Log (MW) (y-axis) vs. Rf (x-axis). From the equation of the line, calculate the MW of the unknown. In your plot, be sure to (1) label the x- and y-axis, (2) show the equation of the line, and (3) show the R2 value. Show your work for the calculation