What is the Km of galactokinase for galactose under these assay conditions?

Galactose can be phosphorylated by the transfer of a phosphate group from ATP, a reaction catalyzed by the enzyme galactokinase: 

galactose+ATP⟶galactokinasegalactose−1−phosphate+ADP

Assume that you have isolated the galactokinase enzyme and have determined its kinetic parameters by varying the concentration of galactose in the presence of a constant, high (i.e., saturating) concentration of ATP. The double-reciprocal (Lineweaver-Burk) plot of the data is shown as in the figure. 

Part A

What is the Km of galactokinase for galactose under these assay conditions?

Express your answer to two decimal places and include the appropriate units.