Start by loading the library and data.

library(dslabs)
data(murders)

7. Use the %in% operator to create a logical vector that answers the question: which of the following are actual abbreviations: MA, ME, MI, MO, MU? Store your result in correct_abb

8. Extend the code you used in exercise 7 to report the one entry that is not an actual abbreviation. Hint: use the ! operator, which turns FALSE into TRUE and vice versa, then which to obtain an index. Store your result in false_entry

Note: Keep the order of the abbrevations in order to get the correct evaluation.