please answer these two questions ASAP I just have 20 mins

QUESTION 1 Consider the figures depicting rectangular pulses on a string. Reference: Ref 17-1 If pulse 1 were reflected from a wall, which one of the patterns above would represent the reflected pulse? OA5 O B. 1 O C.4 O D.3 O E. 2QUESTION 3 Consider the figures depicting rectangular pulses on a string. Reference: Ref 17-1 Which pulses must be superimposed to give the situation shown in 5. O A. 2 and 4 O B. 1 and 2 O C. 2, 3, and 4. O D. 1, 2, and 4 O E. 1 and 3