Define a function IsSumZero$()$ that takes one integer vector parameter and one integer parameter. The function computes the sum of the vector's elements that are less than or equal to the integer parameter. Then, the function returns true if the sum is zero, and returns false otherwise.

Ex: If the input is:

$456-644$

then the vector has $4$ elements $\{5,6,-6,4\},$ and the integer parameter is $4.$ The output is:

False, the sum of the elements that are less than or equal to $4$ is not zero.

Note: The sum is zero if no element is less than or equal to the integer parameter.