4. [1.5 pt] Consider the first test of a nuclear weapon (the Trinity bomb), which used 6.0 kg of plutonium. a) [0.5] What is the rest energy of the plutonium? Show your calculation. b) [0.5] If the Trinity test produced about 100 TJ of energy (10 * J). What fraction of the plutonium mass was converted to energy? Show your calculation. c) [0.5 pts] How many (old-school 100W) lightbulbs would this amount of energy (100T]) light up for how long? Show your calculation