Write a function file named $$SUBTRACTION$\_$FUN$$ that uses nested loops that will perform the following calculation until the value of y is less than or equal to zero. This process will be completed multiple times, each time with a new value of x$.$

y$=$y$-($x$^2-2$x$+4)$

The initial value of y will always be $3750.$ The loop should also keep track of the number of iterations while performing the above calculation. Once the value of y is less than or equal to zero, the final value of y and the total number of iterations should each be stored in their own vectors. These two vectors should be the outputs to your function.

The values of x that will be tested should the input to your function. Your outer loop should cycle through these values.

$[5$ pts$]$ Test your function from part a with the following values of x:

x $=[1,2,3,4,5,6,7]$;