8. In MATLAB, the colon operator can be used in two ways: creating a matrix (or array) and selecting part(s) of a matrix (or array). Explain and give examples of each.

9. For a matrix C, that has 10 rows and 12 columns:

- What is the MATLAB command to select all of row 5 from it?

- What 2 MATLAB commands would ask the user for an integer, N, from 1 to 10 and then create an array D which is just row N from matrix C?

10. For matrix D, that has 5 rows and 8 columns:

- What does the MATLAB command Z=sum(D) do and what is the size (or dimensions) of Z?