Three Neglected Sonatas for Tuba and Piano

I want the text section to be 2 pages long. On the other hand, you need to scan the sample part (within 1 pageyou need while answering the question

For the tuba part(not piano part)
1. What are the challenges of each piece to the performer in terms of technical or musical concerns?
2. What are the ranges of each piece? (Lowest note and highest note)