I need help on probability

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%

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Simplify 24÷(-2)(3)+7 a. -29 b. 3 c. 11