I need steps 1-5

A technician compares repair costs for two types of microwave ovens (type I and type II). He believes that the repair cost for type I ovens is greater than the repair cost for type il ovens. A sample of 60 type I ovens has a mean repair cost of $85.79. The population standard deviation for the repair of type I ovens is known to be $15.13. A sample of 56 type II ovens has a mean repair cost of $78.67. The population standard deviation for the repair of type II ovens is known to be $17.84. Conduct a hypothesis test of the technician's claim at the 0.1 level of significance. Let / be the true mean repair cost for type l ovens and /2 be the true mean repair cost for type Il ovens. Step 1 of 5: State the null and alternative hypotheses for the test