well just simple obediance should do it!!If you want to teach her to sit,then just say "sit",if she doesnt then just push down on her bum gently and when she hits the ground,praise her!! dont train with food.If there is a local obediance class in your town then i would recommend taking her there,There is a older dog in my group and she seems to be learning!!

Or if you dont want to take her,then just show her how to do it and give lots of praise!!im not sure if you can teach a dog to fetch.i guess if she's really into it,then mabye but if she doesnt chase after the ball,then i don tknow what to do. With Rollover just show her what to do,get her to lie down then tell her to "roll over",and if she doesnt,then roll her over yourself,i would recommend using treats with this one.When Kodie was learning down the trainer made us use treats,and we had to pick up his front legs and put him down.and he picked up down pretty quick.lol sry if too confusing!