Use cdma to construct the aggregate frame for two denders s1 frame 0 , s2 frame 1, the code for s1 is (+1,-1,+1,+1,+1,-1,+1,+1), the code for s2 is (-1,+1,-1,-1,-1,+1,-1,-1)

I tried to solve it but I am not sure.

I multiplied s1 code by -1 and s2 code by +1

and then I added the two codes , and i got this answer : ( -2,+2,-2,-2,-2,+2,-2,-2)

Is this correct?