| a. The usual operator, <-, can be thought of as a syntactic shortcut to expression operation |
| b. Assignment can also be made using the function assignment() |
| c. Vectors can be used in arithmetic expressions, in which case the operations are performed element by element |
| d. seq() is used to delete the numbers |
| Answer: Vectors can be used in arithmetic expressions, in which case the operations are performed element by element |