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1) A suddenincrease in the energy generation rate in the core of a star results in asudden increase in internal pressure. Use the virial theorem to argue that thestar will remain stable (i.e. use the virial theorem to figure out the sequenceof changes that will result from the sudden increase in pressure.)2) A) Use the figure (attached) to estimatethe mass of a star which generates 90% of its energy using the CNO cycle.B) Last weekwe derived equationsestimating the central pressure and temperature in stars. Use these to estimatethe mass of a star in which radiation pressure becomes equal to gas pressure.Note: Alllecture notes are attached.