Pls help this is not graded

In the following situation, determine whether you are asked to determine the number of permutations or combinations. then do the calculation how many ways are there to pick a starting five from a basketball team of twelve members? a. permutation; ps - 2520 b. combination; 1c, - 792 c. combination: 2cs - 2520 d. permutation; ps - 95040

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

This is about circle theorems. someone asap : (