This problem refers to questions 1, 2, and 3.

Two students 1 and 2 are holding a long spring made of two springs A and B connected at point J (see figure).

Student 1 creates a pulse having a displacement only on one side of the spring (either y > 0 or y 0, then student 2 receives a pulse with y

NOTE: Please type the answers on a computer not handwriting, If for some questions you can't draw with your computer, just explain in words what your drawing would look like.