Suppose that a study produced the following results out of a

Suppose that a study produced the following results: out of a group of 80 people who took Sleep Helper before going to bed, only 45 of them had difficulty falling asleep. Out of a group of 80 people who took a placebo before going to bed, 50 of ten had difficulty falling asleep. Calculate the absolute and the relative risk reduction due to taking Sleep Helper. Also, calculate the number of people who must take Sleep Helper in order for one person to be helped. (Round to the nearest percent as needed)