#include <future> #include <mutex> #include <iostream> std::mutex mtx3; class MyClass3 { int long_calc1(int j) { std::this_thread::sleep_for(std::chrono::milliseconds(1000)); mtx3.lock(); std::cout << "1 a" << std::endl; mtx3.unlock(); std::this_thread::sleep_for(</iostream></mutex></future>…