Your question is Internship, LMTD, and Heat Exchanger Design. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
What was your internship on, what is LMTD and why do we use it, and what is the process for designing a shell and tube heat exchanger?