The susceptibility of the root stocks of a variety of orange tree to a specific larva is investigated by a group of researchers. Forty orange trees are exposed to the larva and then examined by the researchers 6 months after exposure. The number of larvae per gram is recorded on each root stock. The mean and standard deviation of the logarithm of the counts are recorded to be 9.02 and 1.12, respectively. We want to construct a 90% confidence interval on the mean of the logarithm of the larvae counts. A 90% confidence interval is (8.73, _). The lower limit is given and find the upper limit. Use 2 decimal places.