Write the R code to generate the following output by using character functions 1) Input: "I am a student" Output: "I am a teacher" 2) Input: "I am a student" Output: [[1]] [1] "I" "am" "a" "student" 1) Input: "I am a student" Output: "I am a teacher" 2) Input: "I am a student" Output: [[1]] [1] "I" "am" "a" "student".