Please show calculations thanks!

Round Exchange Rates and % Changes to 6 decimal places FX Rate A/B means # of Units of Currency A per 1.0 Unit of Currency B Assume Gold Standard for the two countries Official Par Value of an ounce of Gold in US Dollar (USD/oz) Official Par Value of an ounce of Gold in Chinese Yuan (Yuan/oz) Official Par Value of one US Dollar in Gold (oz/USD) Official Par Value of one Chinese Yuan in Gold (oz/Yuan) Values 1,480.00 12,580.00 What is the implied official Yuan/USD fixed exchange rate? (Yuan price of an ounce / USD price of an ounce) .... Or if expressed as USD/Yuan 6.799992 0.147059 Exchange Rate in Unofficial Market, Yuan/USD Unofficial Market Exchange Rate, USD/Yuan Does the Official Par Value of Yuan Undervalues/overvalues Yuan? Should Yuan be Devalued or Revalued? Par Value of Gold in Yuan, Consistent with the Market Exchange Rate Par Value of Yuan in Gold, Consistent with the Market Exchange Rate Required Percentage Change in the value of Yuan against US Dollar