4. When the UV-VIS absorbance values of solution A and solution B are 0.3 and 0.6, respectively, in one cell of 1cm light path, calculate the absorbance values of the following mixture solutions A. The mixing volume ratio of A and B is 1:1 (equal volume). B. The mixing volume ratio of A and B is 2:1 in one cell of which the light path is 2cm. [Solution A and solution B are assumed NOT to interact with each other.]