For matrix A=[2314]A = \begin{bmatrix} 2 & 3 \\ 1 & 4 \end{bmatrix}A=[2134], the sum of eigenvalues equals which of the following?
det(A)=5\det(A) = 5det(A)=5
tr(A)=6\text{tr}(A) = 6tr(A)=6
tr(A)+det(A)=11\text{tr}(A) + \det(A) = 11tr(A)+det(A)=11
det(A)/2=2.5\det(A) / 2 = 2.5det(A)/2=2.5