Please put comments if possible, This is for a study guide. (C++)

(10 points) Fill in the missing portions of the following SharedFIFOQueue class that implements a shared FIFO (First In First Out) Queue Hint: A std: :list has member functions push_front, pop front, push_back, pop_back, front, back, and size. Also std: :lock _guard is defi in #ifndef SHAREDFIFOQUEUE H #define SHAREDFIFOQUEUE H #include #incldue template ::size_type size O private: std: st items; std:: mutex itemLock ?ndif