Table 22 measurements from the Lab_Ash table, first using log 10(), and then using z_stand(). Save the resulting table (containing variables LabID and Ash) to a file on disk. Enter the R code you use to perform both actions. Enter your answer here The Pol and Brix samples are a bit tricker because the third-party software is limited to use no more than 2000 samples. To produce calibration files for Brix and Pol, we will need to sub-sample. Additionally, the third-party software produces optimised calibrations when the calibration data has a box distribution. Therefore, to make the calibration files, we need to perform stratified sub- sampling to (a) limit the number of samples and (b) to produce a box distribution. However, the Lab_PB data does not have an existing variable to make stratified sub-samples; we have to make one ourselves. The base library function cut(x) divides the range of x into intervals and codes the values in x according to which interval they fall. The leftmost interval corresponds to level one, the next leftmost to level two and so on. Table 23 Use the following R code to create a variable which can be subsequently used for stratified sub-sampling: Lab_PB$Bbin