At 580 nm, the wavelength of its maximum absorption, the complex Fe(SCN)²⁺ has a molar absorptivity of 7.00 x 10³ L cm^-1 mol^-1. Calculate
(a) The absorbance of a 3.40 x 10^-5 M solution of the complex at 580 nm in a 1.00-cm cell.
(b) The absorbance of a solution in which the concentration of the complex is twice that in (a).
(c) The transmittance of the solutions described in (a) and (b).
(d) The absorbance of a solution that has half the transmittance of that described in (a).