I'm not understand these question can i get help

When a Government official, acting within their scope of authority, makes statements or provides direction to an individual or a prime contractor that results in that party proceeding and incurring costs based upon those statements, which are believed to be true, but are later found to inaccurate or false, the party who relied on those statements is protected under what legal concept? (1 Point)

For the Government to be liable under this legal concept, what are the two prerequisites? (2 Points)

1)

2)

Rarely is the Government or the Government official formally charged with this legal action, as the Government may provide compensation through a corrective action by requesting anequitable adjustment proposal from the contractor, or offering consideration, or even an apologyto offset/alleviate any costs or damages incurred by the injured party.However, in instances where a Government official unintentionally makes incorrect or false statements within their position of authority (predicated upon their current knowledge and understanding), but regulations or laws have been enacted to change what the Government official believed to be true, what protections are afforded the Government from legal action or financial liability?Base your answer citing the determinations of the two case law discussions that were reviewed in class lecture.(2 Points)