Suppose you are working with a data set that is normally distributed, with a mean of 300 and a standard deviation of 48. Determine the value of x from the following information. (Round your answers and z values to 2 decimal places, e.g. 1.25.) (a) 70% of the values are greater than x. (b) x is less than 16% of the values. (c) 23% of the values are less than x. (d) x is greater than 57% of the values