Determine molar absorptivity

A red-colored complex PbX4 prepared from Pb with ligand X() shows promise as a means to determine trace levels of lead in the environment. The analyst prepares five standard solutions (A, B, C, D, and E) of PB: 30, 60, 90, 120, and 150 ppm, respectively. 5 ml of each solution is mixed with 5 ml of 0.10 M X. The transmittance of the five prepared solutions is measured in a 1 cm cell. A reagent blank (5 mL of distilled water and 5 mL of 0.10 M X) is used to set T = 1.00. The transmittances of the resultant solutions are 0.717, 0.543, 0.466, 0.384, and 0.259 for solutions A, B, C, D, and E, respectively.

What is the molar absorptivity (in 4 or more significant digits) of the complex?

(Assume all Pb is complexed into PbX4)