What is an extension of a Metabot file?

A developer uploads a Bot to the Control Room for enterprise-wide deployment. The administrator sets up a schedule for deploying the Bot across all enterprise clients connected to the Control Room. However, for two of the Bot Runner clients this deployment fails, and the run Bot deployment failure is logged to the Audit log.
Which two of the following could be the reason?

Which of the following methods is used to assign a new set of permissions to a group of users?

In case there is no error in a task, the value of "Error Line Number" will be_____.

Which of the following options are true when the user connects to more than one excel file during task execution?