Consider a network where the nodes transmit and receive using CDMA. Assume that two senders$,$ Senderl and Sender$2,$ simultaneously transmit their data to a receiver. Senderl sends data bits $(-1,1)$ using the code $(1,1,1,-1,1,-1,-1,-1).$ Sender$2$ sends data bits $(1,1)$ using the code $(1,-1,1,1,1,-1,1,1).$ Answer the following:a$.$ Calculate $($show your work$)$ the aggregate channel signal at the receiver.b$.$ Show $($by calculation$)$ that the receiver is indeed able to recover Sender$2\text{'}$s data.