I really need help answering this question

Find the vertex of the function given below y=x^2-6x+1

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

Wrote and expression for the difference of p and 4