1. The dataset ChickWeight tracks the weights of 48 baby chickens (chicks) feed four different diets. Feel free to complete all parts of the exercise in a single R pipeline at the end of the problem. a. Load the dataset using data (ChickWeight) b. Look at the help files for the description of the columns. c. Remove all the observations except for observations from day 10 or day 20. The tough part in this instruction is distinguishing between and and or. Obviously there are no observations that occur from both day 10 AND day 20. Google 'R logical operators' to get an introduction to those, but the short answer is that and is & and or is 1. d. Calculate the mean and standard deviation of the chick weights for each diet group on days 10 and 20