A stock has an average return of 8.00% and a standard deviation of 6.00%. Assuming that the returns are normally distributed, calculate the probability that the actual return will be: a) between 2.00% and 20.00%; b) less than 2.00%. Assume that i) 68% of the values fall within 1 standard deviation from the mean ii) 95% of the values fall within 2 standard deviation from the mean iii) 99% of the values fall within 3 standard deviation from the mean