Find the mean, median, quartile 1, quartile 3, interquartile range, minimum, maximum, and standard deviation of `Weightgain`. To do this, apply `summary()`, `sd()`, and `IQR()` to the column of `Weightgain` extracted as a vector. Remember: to extra a column of a data frame as a vector, you use a dollarsign: `dataframenmame$columnname`. Notice the capital W and lowercase g in the variablename `Weightgain`