TODICHI (refer Problem 6) This time, we will compare two groups weight gains. Use the following R. command : table (wg$group) mean (wg$weight_gain [wg$group=="heartbeat"] ) a) How many infants are in each group (group exposed to the sound of human heartbeat, and group with no exposure.) b) Find the sample mean of weight gains for each group. Interpret both means in the context of the problem. Hint: you can modify mean (wg$weight gain [wg$group=="heartbeat"] ) ) c) Construct a side-by-side boxplot. Compare two groups center and spread. Submit your plot