Your answers must be typed in the Solution box for this question. Attachments will NOT be marked and will result in a zero mark for the question. A random variable has a mean of 45 and a standard deviation of 6. a) What additional information do you need about this variable, before using Z tables to determine probabilities associated with it? b) Assuming the information referred to in a) is now provided, use Z tables to determine the probability that a randomly selected value is greater than 42. SHOW WORKINGS TO SUPPORT YOUR