a) Developers reported difficulties in modifying the currency exchange system, and testers decided to check if the report was valid.

b) The refund option was removed from the currency exchange system because customers did not always receive the correct amount.

c) The agile team started working on a user story that adds a new customer loyalty feature to the currency exchange system.

d) The language support option in the currency exchange system was used to enable currency transactions in both English and the local language.