y(x,t)=[(4x+5t)2+5]0.8 represents a moving pulse where x and y are in metre and t in second. Then, choose the correct alternative(s):
a. pulse is moving in positive x-direction
b. in 2 s it will travel a distance of 2.5 m
c. its maximum displacement is 0.16 m
d. it is a symmetric pulse