The health of employees is monitored by periodically weighing them in. A sample of 54 employees has a mean weight of 183.9 lb. Assuming that is known to be 121.2 lb, use a 0.10 significance level to test the claim that the population mean of all such employees' weights is less than 200 lb.

1. Identify the null and alternative hypotheses.

2. Identify the test statistic.

3. Identify the P-value.

4. Identify the null and alternative hypotheses for this test