Use the `seq` command to help answer the following questions: a. Generate a sequence that starts at 5, goes to 20, and goes up in increments of 3. b. What's the 11th element of a sequence that starts at 2.1 and increments by 0.5? (e.g., 2.1, 2.6, 3.1, ...) c. Consider a sequence that starts at 5 and ends at 8 and which has 121 elements. How many elements are greater than 7.13?