Problem 2.8: Consider this list of some possible mistakes in an assignment operation:

a. No assignment operator

b. Unmatched quotes in character string

c. Improper syntax for function argument

d. Invalid object name

e. No mistake

For each of the following assignment statements, say what is the mistake.

1. ralph <- sqrt 10

2. ralph2 <-- "Hello to you!"

3. 3ralph <- "Hello to you!"

4. ralph4 <- "Hello to you!

5. ralph5 <- date()