Evaluate C84 and P77.(If necessary, consult a list of formulas.)=C84 =P77

It seems like you're asking for the calculation of combinations and permutations.

1. C84: This is a combination calculation. The formula for combinations is C(n, r) = n! / [(n-r)! * r!], where n is the total number of items, r is the number of items to choose, and "!" denotes factorial. However, it's not clear what the value of r is in your question.

2. P77: This is a permutation calculation. The formula for permutations is P(n, r) = n! / (n-r)!, where n is the total number of items, and r is the number of items to choose. Again, the value of r is not specified in your question.

Please provide the missing values for a complete calculation.