Hey! There is a link and I need help with these 3 problems for math. Pls give me awnsers and I will mark brainlist, have a good day!!

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?

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%

The median am of triangle ∆abc is half the length of the side towards which it is drawn, bc . prove that triangle ∆abc is a right triangle, and find angle mac and abm