$5.$ Construction of user$-$defined functions $($numerical solvers$)$

Write a user$-$defined function called FunTest$2$ with input variables fun and x and output

variable y$.$ This function takes in an anonymous function input fun and a vector variable x

$($assume this vector to be doubles$).$ The function evaluates the sum of the input fun at x and

outputs the result as y$.$ In other words, the function performs the mathematical operation:

$=$

$$

$=1$

$()$

where $$ is a vector and $$ is the length of the vector $.$ The first line of your user$-$defined

function should look like this:

function y $=$ FunTest$2($fun$,$x$)$

Note: You may use the partially completed m$-$file FunTest$2.$m provided. Copy and paste the

completed m$-$file below. Remember to remove $$part$$ from file name before execution.

Test your result with the function $()=2+5$ and the variable x$=1$:$100.$ In other words, the

function is effectively evaluating the sum $100$

$=1(2+5).$ You may want to double check your

result by directly evaluating the summation