Part A The following R code will build and print in screen the data frame df in your R session (you can try it if you want). The data frame will look like the one posted here. > df print(df) student Grade marks 1 John A 89 2 Alex A 82 3 Smith 75 4 Greg 63 5 Martin C 58 Using the subset () function you can extract any information you want from this data frame. Following are given some pieces of information that were extracted from this data frame using various R codes. Students have to figure out, what was the corresponding R code that produced the pieces of information posted in each of the following questions. a) Assume you want to extract the below information from the df data frame using the subset() function. student Grade 1 John 2 Alex A A marks 89 82 Put down the code you will use for it. Pay attention to what information has to be displayed and how (the format of display - it should be as above). b) Assume you want to extract the below information from the df data frame using the subset() function. 1 student John 2 Alex Put down the code you will use for it. Pay attention to what information has to be displayed and how (the format of display - it should be as above). c) Assume you want to extract the below information from the df data frame using the subset() function. student Grade marks 3 Smith B 75 4 Greg C 63 Put down the code you will use for it. Pay attention to what information has to be displayed and how (the format of display - it should be as above). Part B a) In R, create a data frame named K with columns Books (with values "r", "c", "f") and Types (with values "hardcopy", "electronic", "hardcopy". Show the code you will use for it (take a screen capture of it). b) Display its variable name and the frequency in the form of a table. Show the code you will use for it (take a screen capture of it). c) Show the output you get (take a screen capture of it). Note: r, c, f stands for romance, classic and fiction accordingly.