How do u solve 11 minus 3 in 2 ways

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

What point is the projection of q on a) r b) s c) t

10 points? me . its important ‼️‼️