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If you want to be able to compile the following code,

Rational r1; int x; cout << r1 + x << endl; which overloaded operator(s) do you need? a. friend Rational operator+( const Rational& left, int right); b. friend void operator+ (const Rational& left, int right); c. friend ostream operator << (ostream& out, const Rational& object); d. friend ostream& operator << (ostream& out, const Rational& object); e. A and C f. A and D

Which of the following is a method you can use to stop the spread of a virus?

A) If there are backup devices connected to the infected machine, disconnect them. B) If the infection is on a subnetwork, immediately disconnect that subnetwork. C) If there are servers with sensitive data that are connected to the infected machine, disconnect those servers. D) All of the above