5a) A CDMA receiver gets the following 8-bits chip:(+1 +3 -1 +1-1 +1 -3 -1), and assuming the following chip sequences for stations A, B, C, and D. Who is transmitting what? Explain your complete answer and the method you use to find your answer Chip sequences: C(-1 +1 -1 +1 +1 +1-1-1), D(-1 +1-1-1-1-1 +1-1) 5b) In question 5a, there are 4 stations that are transmitting, now assume that we add two more stations, E and F, provide the chip sequences of these stations? (For question 5b, here is a hint: the two chip sequences you propose should be orthogonal to all other chip sequences, so the inner product of that chip sequence and all other sequences should be zero. If you write down all of these conditions, by some simple simplifications and the fact that the chip sequence cannot be zero, you should be able to identify the next chip sequences.) 5c Given your response in question 5b, assume that B, D, and E are transmitting simultaneously, and are sending the following three bits respectively: 0,1,1. What is the resulting sequence that is transmitted/ received by the receiver? Explain your response