The mean sale per customer for a gas station is $36.00 with a standard deviation of $8.45. Assume the shape of the distribution of the sales are bell- shaped. Roughly what percentage of the customer sales at the gas station are between $36.00 and $52.90? To answer this and get full credit, you must answer all three parts given below: a. The Z score for the value of $36.00 is b. The Z score for the value of $52.90 is c. According to the Empirical rule, the percentagg of the customer sales at the gas station that are between $36.00 and $52.90 is %