Which of the following statement$($s$)$ is true about Orthogonal Sequences used in CDMA?

Group of answer choices

Each sequence is made of N elements, where N is the number of stations.

If we multiply two equal sequences, element by element, and add the results, we get $0.$

If we multiply two equal sequences, element by element, and add the results, we get N$,$ where N is the number of elements in each sequence.

If we multiply two different sequences, element by element, and add the results, we get $0.$

If we multiply two different sequences, element by element, and add the results, we get N$,$ where N is the number of elements in each sequence.