Needs to be in R!

1. Substrings and replacements Trump - "Donald Trump" others = c("Barack Obama", "George Bush", "Bill Clinton") a. Display the first 5 letters from the string Trump. b. Display the first 5 letters from each of the strings in the vector others. C. Join Trump and others together into one vector of strings, called presidents. d. Display the last 3 letters from each of the strings in the vector presidents. e. Copy presidents over to a new string presidents.borg. Replace the last 4 letters in each of the strings in presidents.borg with "borg". Display the results. f. Run the following codes and explain the replacement results. college = "Dietrich" substr(college, 5, 9) - "right" college = "Dietrich" substr(college, 1, 3) = "Live" words = c("fat", "hat", "lamp", "glade") substr(words, 1, 1) = c("c", "b") animals = c("cat", "lion", "piggy", "chic ken") substr(animals, 1, 5) = c("kitty", "doggy subjects = c("Statistics", "Computer Scie nce", "Mathematics", "Engineering") ratings = c("Good", "Bad") substr(subjects, nchar(subjects)-nchar (ra tings ) +1, nchar(subjects)) = ratings