He just copied from Chegg.com and paste the answer here. The question is to be done in MATLAB and it has clearly stated on the question. He just downloads someone's work from Chegg.com and pastes the answer here. Do not buy his answer. This is fraud. below is the link to his copied answer from chegg.com for your proof: 

https://www.chegg.com/homework-help/questions-and-answers/project-use-pdetool-pdemodeler-model-beam-shape-dimensions-sho...