Let a be an n xn matrix. its only eigenvalues are 1,2,3,4,5 possibly with multipliciti what is the nulity of the matrix a + iwhere 1, is the n x n iderntity mat

Let A be an n xn matrix. Its only eigenvalues are 1,2,3,4,5 possibly with multipliciti What is the nulity of the matrix A + Iwhere 1, is the n x n iderntity matrix? (A) 1 (B) 0 (C) 3 (D) n - 5