need help with this exercise please

Problem 1 (2 points). Every month a clothing store conducts an inventory and calculates the losses due to theft. The store would like to reduce these losses and is considering two methods to do so: the first is to hire a security guard and the second is to install cameras. The manager of the store has conducted the experiment: During the first 6 months he hired a security guard (method 1) and during the next 6 months he installed cameras (method 2). The monthly losses were reported as follows: Security guard 350 289 407 398 470 259 Cameras 488 301 276 380 421 425 a/ Test with a = 0.05 to determine whether there is enough evidence to conclude that expected monthly loss when installing cameras differs from 382. b/ Since the cameras are cheaper than the guard, the manager would prefer to install the cameras unless there was enough evidence to infer that the guard was better. Conduct a hypothesis testing to advise what the manager should do? (Assuming equal variances and using a = 0.05)