How do function objects enable functional compositions, aiding in more readable and maintainable code?

The static data members and static member functions aren't quite what I'm going for in this particular instance.

C++ Code Step 1: Preparation For the moment, "comment out" the following under-construction code: In dynamicarray.h: All function prototypes except the constructors and destructor. Keep the member variables (but we will be replacing them shortly). In dynamicarray.cpp: All function implementations except the constructors and destructor. You should also remove (not just comment out) INITIAL_CAP, and replace it with a hard-coded 10 inside the default constructor. This will also eventually go away. In main: Comment out all the code inside the RunPart1Tests function between the linesbool pass = true; and return pass; • Also in main: Comment out all the code in the main function starting with the "Equality comparison" comment and just before the "return 0;" line. Step 2: Replacing member data and the two constructors You're going to replace the current member data (arr, len, and capacity) with a single vector of integers. Remember that vectors keep track of their own size and capacity, so…