Only answer all of part B in R. Give the R commands.

Write an explicit stacked set of if statements that does the same thing as the integer version of the switch function illustrated earlier. Test it with mynum dosage [1] 10.0 60.0 60.0 60.0 10.0 25.3 25.3 ii. Using the same lowdose, meddose, and highdose thresholds as in (i), given doselevel dosage [1] 25.0 25.0 25.0 83.4 25.0 83.4 83.4 Also, doselevel has been overwritten as follows: R> doselevel [1] Small Small Small Large Small Large Large Levels: Small Large iii. Given lowdose dosage [1] 9 49 49 Also, doselevel has been overwritten as follows: R> doselevel 1] Small Large Large Levels: Small Large iv. Using the same lowdose, meddose, and highdose thresholds as (iii), as well as the same doselevel as (i), the result of dosage after running the nested if statements is as follows: R> dosage [1] 4.5 91.5 91.5 91.5 4.5 26.0 26.0 Assume the object mynum will only ever be a single integer between 0 and 9. Use ifelse and switch to produce a command that takes in mynum and returns a matching character string for all possible values 0, 1, ..., 9. Supplied with 3, for example, it should return "three"; supplied with o, it should return "zero", Write an explicit stacked set of if statements that does the same thing as the integer version of the switch function illustrated earlier. Test it with mynum dosage [1] 10.0 60.0 60.0 60.0 10.0 25.3 25.3 ii. Using the same lowdose, meddose, and highdose thresholds as in (i), given doselevel dosage [1] 25.0 25.0 25.0 83.4 25.0 83.4 83.4 Also, doselevel has been overwritten as follows: R> doselevel [1] Small Small Small Large Small Large Large Levels: Small Large iii. Given lowdose dosage [1] 9 49 49 Also, doselevel has been overwritten as follows: R> doselevel 1] Small Large Large Levels: Small Large iv. Using the same lowdose, meddose, and highdose thresholds as (iii), as well as the same doselevel as (i), the result of dosage after running the nested if statements is as follows: R> dosage [1] 4.5 91.5 91.5 91.5 4.5 26.0 26.0 Assume the object mynum will only ever be a single integer between 0 and 9. Use ifelse and switch to produce a command that takes in mynum and returns a matching character string for all possible values 0, 1, ..., 9. Supplied with 3, for example, it should return "three"; supplied with o, it should return "zero