Exercise 2: indexing and filtering vectors
Create a vector first_ten that has the values 10 through 20 in it (using
the : operator)
Create a vector next_ten that has the values 21 through 30 in it (using the seq() function)
Create a vector all_numbers by combining the previous two vectors
Create a variable eleventh that contains the 11th element in all_numbers
Create a vector some_numbers that contains the 2nd through the 5th elements of all_numbers
Create a vector even that holds the even numbers from 1 to 100
Using the all() function and %% (modulo) operator, confirm that all of the numbers in your even vector are even
Create a vector phone_numbers that contains the numbers 8, 6, 7, 5, 3, 0, 9
Create a vector prefix that has the first three elements of phone_numbers
Create a vector small that has the values of phone_numbers that are less than or equal to 5
Create a vector large that has the values of phone_numbers that are strictly greater than 5
Replace the values in phone_numbers that are larger than 5 with the number 5
Replace every odd-numbered value in phone_numbers with the number 0