Please create a factory for this question:  The xml for this question can be found [here](https://github.com/CarletonComputerScienceSociety/discretemath.ca/blob/1d738dd4896d9d91329533d0b6d595838fddbbdb/app/src/data/questions/comp2804/exam-fall-2013/f13f04.xml). Please copy the way [this file](https://github.com/CarletonComputerScienceSociety/discretemath.ca/blob/dfc18ba914a0f4a98d6f3ad653ef7d3cf021325e/app/src/apps/Examinations/lib/factories/HowManyFunctions.js) generates questions.
