$1.$ Below are two pulses $($which are a form of wave$)$ moving towards each other at $\backslash (1\backslash$mathrm$\{$~cm$\}/\backslash$mathrm$\{$s$\}\backslash )$ at $\backslash (\backslash$mathrm$\{$t$\}=0\backslash$mathrm$\{$~s$\}\backslash ).$ The size of the large blue squares are $1$ cm in length and $1$ cm in height, as shown below. Draw the resultant wave at $\backslash ($ t$=3\backslash$mathrm$\{$~s$\}\backslash ),$ and $4$ s $.$ Make sure that it is too scale and you clearly label $\backslash (\backslash$mathrm$\{$x$\}=0\backslash )$ on your diagram.