Please can you help me with this practice question from my lecture. I have completed the question already and just need some compare it with someone. Thank you for any help!

Suppose Robinson Crusoe produces Coconut (C) and Fish (F) using only labour and the production functions are: ? = 10jQuery224016216839920910853_1622040788115 and ? = ??? ?? and ?? represent labour devoted to the production of coconut and fish, respectively, and ?>0 is a constant.

Suppose labour supply is fixed at L = 400, and the utility function of Crusoe is ? = ??. I. Suppose ? = 1. Derive Crusoe's production possibility frontier for coconut and fish production.

Please give a good answer with detail and I will leave a fantastic review