Hi, I' ve met two problems below, solutions of which were doubtful, could sb give some ideas?:(
1. which letter is not homomorphic to letter C? J,N,S,O,U
2. function f is a linear function composed of two linear pieces and continuous on [0,2], f(0)=f(2)=0 and f_max=1, what is the length of the graph of f ?