$$ Whats wrong with this code? Error says ufunc isfinite not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule safe

$4\mathrm{.}3[2pt$ What $22$ matrix, with integer entries, has $10$ and $25$ as eigenvalues with eigenvectors $1,4$ and $1,-1,$ respectively? Store it in the variable matrix$\_$answer.

Hint: Put variables for entries in a $22$ array $([a_{11},a_{12}],[a_{21},a_{22}]),$ write out the equations that must be satisfied, and solve for the entires.

import numpy as $np$

$A=np.$array$(\left[\begin{array}{cc}1& 4\\ 1& -1\end{array}\right])$

vals$=$np$.$linalg.eigvals $(A)$

vecs$=$np$.$linalg.eig $(A)$

a$11=$vals $$

$a12=$vecs$[][1]$

a$21=$vecs $[1][1]$

a$22=$vals $[1]$

matrix$\_$answer $=np.$array$(\left[\begin{array}{cc}a11& a12\\ a21& a22\end{array}\right])$

print $($matrix$\_$answer$)$