The Adobe Campaign developer sets a 'once' frequency scheduling activity tor a workflow. What is the expected workflow behavior?

A developer has added an additional attribute named "countryCode* to an extension of the nms;delitfery schema inside an element named "madcet". The attribute is required to be configurable through the nm&delivery input form. What is the correct XPattt syntax to access the attribute from an input element?

An Adobe Campaign operator is included in the Workflow Supervisors Operator Group, and is required to have Administrator access for one week only. What would be the best practice to overload the operator's existing rights?

A client is using Their own Customer schema instead of the default Recipient schema. What out-of-the-box functionality do they lose if they do so?

System ABC (a retail company) wants to measure performance by activating 10% random sampling in a" the campaigns they will be executing in the future. In the campaign template's advanced campaign parameters, where would the Adobe Campaign developer apply the changes?