$1-$ Create a pluggable databases pdb$3$ with script.

$2-$Create user$1$ and user$2$ with necessary privileges to create$/$insert$/$update table t$1$ and t$2$ respectively.

$3-$ Create two tablespaces tbs$1$ and tbs$2$ for user$1$ and user$2$ respectively.

$4-$ Create table tbs$1.$t$1$ and tbs$2.$t$2$ where t$2$ has a foreign key referencing t$1.$

$5-$Insert into t$110$ rows where $5$ rows with location Riyadh and $5$ rows with location Jeddah.

$6-$Allow user$2$ to select rows from user$1.$tbs$1.$t$1$ with location$=$Riyadh