Hi I am stuck on two questions about WOs, please help

Show if  \left \langle A , R \right \rangle , \left \langle B , S \right \rangle \in W O then the sum  \left \langle C , T \right \rangle \in W O
Where  a T b \Leftrightarrow ( a \in A \wedge b \in B ) \vee ( a , b \in A \wedge a R b ) \vee ( a , b \in B \wedge a S b )

Show if  \left \langle A , R \right \rangle , \left \langle B , S \right \rangle \in W O then the product  \left \langle C , U \right \rangle \in W O
Where  \left \langle x , y \right \rangle U \left \langle x ^{\prime} , y ^{\prime} \right \rangle \Leftrightarrow ( y S y ^{\prime} )  \vee ( y = y ^{\prime} \wedge x R x ^{\prime} )


Thanks,
Steph