UV-Vis Spectroscopy and Beer-Lambert Law

A solution of potassium permanganate (KMnO4) shows an absorbance of 0.750 at 525 nm when measured in a 1.00 cm cuvette. The molar absorptivity of KMnO4 at 525 nm is 2.40 × 10³ L/(mol·cm). (a) Calculate the concentration of the solution. (b) What would the absorbance be if the concentration were doubled? (c) What percent of light is transmitted through the original solution?