An environmentalist collects a liter of water from each of 45 different locations along the banks of a stream. He measures the amount of dissolved oxygen in each specimen. The mean oxygen level in the sample is 4.62 mg. Assume the population standard deviation is known and equal to 0.92 mg. A water purifying company claims that the mean oxygen level in the stream is less than 5mg. ( a=0.01) Specify H(o), H(a), parameter u, calc test statistics and p value.