4. For a data item x, the notation x

4. For a data item x, the notation x < a is used to reference the subset of values of x that are less than the value a. Pick a reasonable length a and use the subset() command to create a trimmed version Of coding. mrna called lengths. subset that only contains data for transcripts With length less than a. This is one simple strategy for making the structure Of the data easier to view in the plot. lengths. subset subset(coding.mrna, coding.mrna$transcript_length < a) With the trimmed data, draw a histogram and boxplot, and calculate summary statistics. Now describe the shape of the data. Explain your choice of where to trim the data.