When are the copy constructor and assignment operator called

In the CopyAssignExample structure, both a user-defined copy constructor and a copy assignment operator are implemented. It is necessary to determine in which cases each of them will be invoked.

struct CopyAssignExample {
    CopyAssignExample(const CopyAssignExample& other) {
        x = other.x;
        y = other.y;
        z = other.z;
    }

    CopyAssignExample& operator=(const CopyAssignExample& other) {
        x = other.x;
        y = other.y;
        z = other.z;
        return *this;
    }

    int x;
    int y;
    int z;
};

void SomeFunc() {
    // place examples here demonstrating calls to the copy constructor and the assignment operator
}

Usage example:

CopyAssignExample a;            // default constructor
CopyAssignExample b = a;       // copy constructor is called

CopyAssignExample c;            // default constructor
c = b;                          // copy assignment operator is called

Describe which code constructs lead to the invocation of each method.