Consider the following Bayesian Network containing four Boolean random variables.

P$($A$)$

$0\mathrm{.}1$

P$($B$)$

$0\mathrm{.}5$

P$($C$|$A$)$

P$/$C

$-$A$)$

$0\mathrm{.}7$

$0\mathrm{.}2$

P$($D$|$A$,$ B$)$

$0\mathrm{.}9$

P$($D $|-$A$,$ B$)$

$0\mathrm{.}6$

P$($D$|$A$,-$B$)$

$0\mathrm{.}7$

P$($D$|-$A$,-$B$)$

$0\mathrm{.}3$

a$)$

b$)$

Compute P$(-$A$,$ B$,-$C$,$ D$)$

Compute P$($A $|$ B$,$ C$,$ D$)$