If possible, fill in the missing values to make the following matrix a doubly stochastic matrix. If it is not possible put -1 in each blank.

$\left.\vphantom{\begin{array}{c}\!\strut\\\!\strut\\\!\strut\\\end{array}}\right[$		$0.21$	$\left.\vphantom{\begin{array}{c}\!\strut\\\!\strut\\\!\strut\\\end{array}}\right]$
	$0.21$