For MATH152/April 2015/Question B 4 (b), again it would be very helpful for students if you write the details about the way to get c_1 and c_2.
Also, I think the second equality is not right when you find the real form of the solution.
If I misunderstood, feel free to let me know!
Additionally, please revise your solutions first. Then, if you don't have enough time to write hints and solutions of 7 questions in MATH 110, we don't need to finish all your workload. Just work 6 hours and let me know.