Create a programmer$-$function that takes an input, subtracts $1$ from its value, and return the result to the main program. Write a short main script to call your function to make sure it works.

Create a function that calculates the values of $g(x)=cos(x)+cos(1\mathrm{.}1x).$ The input to the function could be a vector, and the output should be the calculated values $g(x).$

In a script, allocate a variable $x$ from $0$ to $100$ in $200$ linearly spaced steps. Call the function from the script. Then, plot $g(x)$ vs$.x.$

In the previous problem, what variables were local to the script? What variables were local to the function? Were any variables global in scope?