I have a table $-$ SA Customer in model driven app dataverse.

In the table I have columns like $-$

arT$\_$AccountManager $($lookup column $-$ looking to SA Auditors table$)$

arT$\_$Rep $($lookup column $-$ looking to SA Auditors table$)$

OwnerId $($owner datatype column system required column$)$

Customer $($lookup $-$ looking to Customers V$3$ table$)$

Write Javascript code to define Account Manager and Rep column based on related Customer Column.

If Customer is not assigned, make Account Manager who is the owner of this record.

If Customer is assigned, make Account Manager $=$ Customers V$3,$ mserp$\_$employee

and Rep $=$ 'Customer postal address' $,$ mserp$\_$salesRep $($use address where Primary $=$ true$)$