Class Tester has the following fields: class Tester {

private int x;
private String s;
private boolean b;

}
Select the headers that could be constructors of Tester?

public static void main (String[] arg)

public static Tester();

public void Tester()

public Tester()

public Tester(int x, String s, boolean b)

public new Tester()

An electric motor is used to drive a power press which makes steel turning moment diagrams 323 pressings from a metal sheet. the motor runs at a mean speed of 50 rev/s. the torque required is 10.0nm for 0.2s, followed by 1.0nm for0.3 s with this sequence then being repeated. what is the minimum power required of the motor and the moment of incrtia required for the t1ywhcel if the speed fluctuations are to be restricted to 1.5%?