Need model answers to university level C problems

I am a tutor teaching university students basic C, and am currently working on a test suite for self-assessment of student exercises. I am looking for someone to complete a few set tasks and return model answers for use in testing my implemented test suite (unfortunately I am unable to find the time to do this myself). Good English and a basic understanding of C will be required. For the model answers to be suitable they must remain within the limits of the topics discussed in the tasks, as well as have basic comments in order to pass the test suite.. The final deliverable will be a set of .c and .h files with correct, working code, which passes the test suite implementation for all tasks presented (I will check any code presented before payment). I would estimate the work should take under 2 hours.