Help solving wave functions from image

[Mattofix]

Homework Statement

http://aycu20.webshots.com/image/43659/2005653976182996826_rs.jpg

Homework Equations

The Attempt at a Solution

please can someone point me in the right direction - i have read the textbooks, looked at the lecture notes and i don't have a clue what to do.

 

[Mapes]

Does the string respond linearly? If so, you can apply the principle of superposition.

 

[Dick]

Does the string respond linearly? If so, you can apply the principle of superposition.

In other words, just add y1 and y2 to get the total wave and then set t to various values and graph the shapes.

 

[Mattofix]

thaks guys