Answer All 5 and I will give you brainliest

Could someone with number 1 and 2

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?

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%