Piecewise time dependent PRA

$0\le t<2$

$2\le t<4$

$4\le t<6$

$6\le t<8$

$8\le t$

${\beta }_{\text{PRA1}}\left(t\right)$

1

0

0

0

0

${\beta }_{\text{PRA2}}\left(t\right)$

0

1

0

0

0

${\beta }_{\text{PRA3}}\left(t\right)$

0

0

1

0

0

${\beta }_{\text{PRA4}}\left(t\right)$

0

0

0

1

0