The government wants to clamp down on the use of a particular pesticide X in crop- growing. They suggest that a maximum value of 0.05 ppm should be found when crops are screened for this pesticide. A random sample of of crops were selected to test for the level of this pesticide. The sample information is summarized below: n = 150, y = 0.056 ppm, s = 0.007 ppm Find the upper bound of the 95% confidence interval for the amount of pesticide present in the crops sampled [Note: For n = 150 and this level of significance, the critical value is t* = 1.976]