Sales of a Canadian consulting company's services are forecast to be between $12.2m and $14.6m during the first half of next year and between $10.2m and $13.9m during the second half. The forecasts are normally distributed and represent a central range with 0.9 probability (i.e., there is a 90% probability that sales in the first half will be between $12.2m and $14.6m. The probability of being $14.6 is 0.05) What is the mean and standard deviation of sales during the first half of next year? b) What is the mean and standard deviation of sales during the second half of next year? c) What is the mean and standard deviation of sales during the whole next year