Question $4(7$ marks$)$

A CDMA signal $s(t)$ is received as shown below,

Rececied CDMA Signal s$($t$)$

Assume all messages being sent through $s(t)$ are $2$ bits long. Decode the messages $m_1$ and $m_2$ encrypted in $s(t)$ by using the Walsh$-$Hadamard Code $w_1=\left[\begin{array}{ccccccc}1& 0& 0& 1& 0& 1& 1\end{array}\right]$ and all your calculation steps clearly.