Five people, Arnie, Beth, Chas, Dave and Ed weigh themselves. You are given the following information about their weights. The mean weight of Arnie, Beth and Chas is 70 kg. The mean weight of Beth, Chas and Dave is 76 kg. The mean weight of Chas, Dave and Ed is 77 kg. Chas and Ed weigh the same. Arnie weighs 75 kg. Find the weights of the other four people.