How many squats,pushups and crunches should I do ina week for a good workout?

Listen I had a good friend. He was 62. He did 75 push ups a day. He died last May. I have had three friends die in the last two years. Everyone of them told me to get more exercise, eat better and stop smoking. There all pushing up Daisy's and I'm still walking around. Here is my advice. Just get yourself a good recliner and a wide screen TV and forget the whole thing.|||20 of everything in the morning and at night