Code Challange! Q.When a Marketplace record is created or edited then update account field with comma separated value.

Marketplace is related to Asset (e.g., via a lookup or master-detail relationship). Related Lists    Asset is related to Account (e.g., via a lookup field like AccountId). Related Lists    Account has a field called Active Marketplace (Text Field)    When a Marketplace record is created or updated, update 'Active Marketplace' on the Account with comma separated values of all marketplaces.  Example : Active Marketplace = Marketplace 1,  Marketplace 2, demoMarketplace, ...