Which of the following statements are true if the market value of an investment declines materially below its equity$-$method carrying amount and the decline is deemed to be other than temporary?

Multiple select question.

The carrying amount of the investment should be written down to the market value.

The equity is adjusted for the unrealized impaired value.

A loss should be recognized in the income statement.

The carrying amount of the investment should be written down to the historic value.

The carrying amount of the investment should be written down to the book value.