The amount of a uniformly distributed radioactive contaminant contained in a closed reactor is measured by its concentration c (becquerel/liter or Bq/L). The contaminant decreases at a decay rate proportional to its concentration-that is, decay rate = -kc where k is a constant with units of day^-1. Therefore, according to Eq. (1.13), a mass balance for the reactor can be written as dc/dt = -kc (change in mass) = (decrease by decay) 1. Use Euler's method to solve this equation from t = 0 to 1 d with k = 0.175d^-1. Employ a step size of Delta t = 0.1. The concentration at t = 0 is 100 Bq/L. 2. Plot the solution on a semilog graph (i.e., In c versus t) and determine the slope. Interpret your results