In a parallel circuit with two light bulb what happen if one burn out

Plss anybody know how to do this? ? i need the answers from a through d

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell