4. a) Why does the valuer need to understand the nature of the business conducted on the premises in order to analyse its accounts when applying the profits method and why is it preferable to assess more than one year's accounts? b) Why would a DRC (Depreciated Replacement Cost) valuation not normally be acceptable for secured lending purposes? Under what special circumstances.can. this be accepted c) How the Comparative Method is involved when applying the other Valuation Methods? Why it is.considered the cornerstone of every valuation