#### Answer

$d=13$
M$(5,\frac{1}{2})$

#### Work Step by Step

$d=\sqrt {(x_2-x_1)^2+(y_2-y_1)^2}$
$d=\sqrt {(11-(-1))^2+(-2-3)^2}$
$d=\sqrt {(12)^2+(-5)^2}$
$d=\sqrt {144+25}$
$d=\sqrt {169}$
$d=13$
M$(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})$
M$(\frac{-1+11}{2},\frac{3+(-2)}{2})$
M$(\frac{10}{2},\frac{1}{2})$
M$(5,\frac{1}{2})$