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

$\left.\vphantom{\begin{array}{c}\!\strut\\\!\strut\\\!\strut\\\!\strut\\\end{array}}\right[$	${\rm a}$	$0.18$	${\rm b}$	$\left.\vphantom{\begin{array}{c}\!\strut\\\!\strut\\\!\strut\\\!\strut\\\end{array}}\right]$
	$0.21$	${\rm c}$	$0.49$
	$0.46$	$0.65$	${\rm d}$

In order that the matrix be stochastic, we must have a =
If the matrix is to be regular to stochastic, we must have b = .
Which means that if the matrix is to be stochastic c = and d =
The sum of the entries in the second row is
The sum of the entries in the third row is
(T/F) This matrix is doubly stochastic ? True False