1. Using the subs function, substitute 4 into each expression/equation defined in Practi...

1. Using the subs function, substitute 4 into each expression/equation defined in Practice Exercises 12.1 for x (or X). Comment on your results.

2. Define a vector v of the even numbers from 0 to 10. Substitute this vector into all four versions of expression/equation 1: exi, EX1, eci1, and EQ1. Does this work for all four versions? Comment on your results.

3. Substitute the following values into all four versions of expression/ equation 4—ex4, EX4, eq4, and EQ4 (this is a two-step process because x is a vector):

4. Check your results for Exercise 3 in the workspace window. What kind of a variable is your result—double or symbolic?