why is my mcgraw hill not working, every time I try to launch it it says Lti configuration error. Please contact your admin. LTI Custom Error, Couldn't find in request the field: context_id

Hey i really need some solving this problem: 1. encrypt this binary string into cipher text: 110000. include in your answer the formula the decoder would use to decrypt your cipher text in the format (coded answer) x n mod (m) = y & 2. decrypt this cipher text into a binary string: 106 you.