PLEASEEE HELP ANSWER THESE TWO WITH REASONABLE ANSWERS AND I WILL GIVE BRANLIEST!

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%

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

If a || b and e || f , what if the value of y ?