To determine the concentration of copper ions in the given sample using polarography, we need to use the Ilkovic equation:Ip = 2.99 * n^1.5 * D^0.5 * A * C / t^0.5where:Ip = peak current 2.56 A n = number of electrons involved in the redox reaction for Cu2+, n = 2 D = diffusion coefficient for Cu2+, D 7.2 x 10^-6 cm^2/s A = electrode area we need this value to proceed C = concentration of the copper ions the value we want to find t = time we need this value to proceed To solve for the concentration C , we need the values for electrode area A and time t . Please provide these values so that we can calculate the concentration of copper ions in the sample.