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25. Which of the following is the set of the eigenvalues of $\mathbf{A} = \begin{bmatrix} 0 & -1 & -1 \\ 0 & 1 & 1 \\ 2 & 2 & -1 \end{bmatrix}$?(A) $\{-1, 0, 1\}$; (B) $\{-1, -1, 0\}$; (C) $\{0, 1, 1\}$; (D) $\{-1, 1, 1\}$; (E) $\{-1, -1, 1\}$; (f) $\{1, 1, 1\}$.3. Proof Questions (15%)

24. Given the following three points $(x1 = 1, y1 = 4)$, $(x2 = 2, y2 = 8)$, $(x3 = 3, y3 = 8)$, compute the best least squares fit by a linear function $y = c1 + c2x$. What is the value of $c_2$?(A) -4; (B) -3; (C) -2; (D) -1; (E) 0; (f) 1; (g) 2; (h) 3; (i) 4.

23. Let $\mathbf{u}1 = \begin{bmatrix} 2 \\ 1 \end{bmatrix}, \mathbf{u}2 = \begin{bmatrix} 7 \\ 4 \end{bmatrix}$, and $\mathbf{v}1 = \begin{bmatrix} 7 \\ 5 \end{bmatrix}, \mathbf{v}2 = \begin{bmatrix} 4 \\ 3 \end{bmatrix}$. Which of the following is the transition matrix from the basis $\{\mathbf{v}1, \mathbf{v}2\}$ to the basis $\{\mathbf{u}1, \mathbf{u}2\}$?(AB) $\begin{bmatrix} 4 & -7 \\ -1 & 2 \end{bmatrix} \begin{bmatrix} 7 & 4 \\ 5 & 3 \end{bmatrix}$; (AC) $\begin{bmatrix} 2 & 7 \\ 1 & 4 \end{bmatrix} \begin{bmatrix} 7 & 4 \\ 5 & 3 \end{bmatrix}$; (AD) $\begin{bmatrix} 3 & -4 \\ -5 & 7 \end{bmatrix} \begin{bmatrix} 2 & 7 \\ 1 & 4 \end{bmatrix}$; (AE) $\begin{bmatrix} 7 & 4 \\ 5 & 3 \end{bmatrix} \begin{bmatrix} 2 & 7 \\ 1 & 4 \end{bmatrix}$;(BC) $\begin{bmatrix} 4 & -7 \\ -1 & 2 \end{bmatrix} \begin{bmatrix} 3 & -4 \\ -5 & 7 \end{bmatrix}$; (BD) $\begin{bmatrix} 2 & 7 \\ 1 & 4 \end{bmatrix} \begin{bmatrix} 3 & -4 \\ -5 & 7 \end{bmatrix}$; (BE) $\begin{bmatrix} 3 & -4 \\ -5 & 7 \end{bmatrix} \begin{bmatrix} 4 & -7 \\ -1 & 2 \end{bmatrix}$; (CD) $\begin{bmatrix} 7 & 4 \\ 5 & 3 \end{bmatrix} \begin{bmatrix} 4 & -7 \\ -1 & 2 \end{bmatrix}$.

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