Given the IntNode class, define the IsSorted$()$ function that takes the head node of a linked list as a parameter and determines if the numbers in the list are in ascending order. IsSorted$()$ returns true if the list is in ascending order, has only one item, or is empty; otherwise, isSorted$()$ returns false.

Ex: If the list contains:

head $->14->19->22->99$

IsSorted$($headNode$)$ returns true.

Ex: If the list contains:

head $->14->19->22->99->14->100$

IsSorted$($headNode$)$ returns false.

Ex: If the list contains:

head $->$

IsSorted$($headNode$)$ returns true. in c$++$