A pulse is started at a time `t = 0` along the `+x` directions an a long, taut string. The shaot of the puise at `t = 0` is given by funcation `y` with
`y = {{:((x)/(4)+1fo r-4ltxle0),(-x+1fo r0ltxlt1),("0 otherwise"):}`
here `y` and `x` are in centimeters. The linear mass density of the string is `50 g//m` and it is under a tension of `5N`,
The vertical displacement of the particle of the string at `x = 7 cm` and `t = 0.01 s` will be
A. `0.75 cm`
B. `0.5 cm`
C. `0.25 cm`
D. zero
