pls help me to solve it with full explanationand make sure the answer is right

Suppose a real estate agent is interested in comparing the asking prices of condos in Montreal and Halifax. The agent conducts a small telephone survey in the two cities, asking the condo prices. A random sample of 20 listings in Montreal resulted in a sample average price of $345,000, with a standard deviation of $14,700. A random sample of 27 listings in Halifax resulted in a sample average price of $350,000, with a standard deviation of $13,500. The agent assumes condo prices are normally distributed and the variance in prices in the two cities is about the same. What would he obtain for a 90% confidence interval for the difference in mean condo prices between Montreal and Halifax? Test whether there is any difference in the mean prices of single-family homes of the two cities for a = 0.10. (Round your answers to 2 decimal places, e.g. 0.75.) ?5 H1 - H2 (the lower interval)