What type of field cannot be used in a formula field?

What are two reasons to create unmanaged packages? (Choose two.)

You have Custom Object A & Custom Object B; a record has to be created on B once certain criteria is met A.
How can this be achieved?

Which type of component CANNOT be added to a Lightning App Builder page?

At Universal Containers, the VP of Service has requested a visual indicator flag on each case, based on the case priority. High-priority case should be flagged red, medium-priority should be flagged yellow, and low-priority cases should be flagged green.
Which two formulas will accomplish this requirement? (Choose two.)