running swimming biking...

My grandma dolly mentioned to me that she wanted to do a triathalon, and she wanted me to do it with her. My first thoughts were yea right! A triathalon is were you run for like 2 miles, then jump in the water and swim for a mile and a half. Lastly you have to climb out of the water, grab a bike and ride for like another 2 miles or so. I have been running for two miles every other day, but i highly doubt i would be able to swim for a mile and a half. Maybe in the future i will be able to train better, and do a triathalon like the Ironman.