Use the same Classical$-$type table showing the number of days of labor input required to obtain $1$ unit of output of each of the five commodities in each of the two countries:

$\backslash$table$[[,$Gems,Computers,Cars,$\backslash$table$[[$Mineral$],[$Fuels$]],$Pharmaceuticals,Furniture,Aircrafts,$\backslash$table$[[$Works of$],[$Art$]]],[\backslash$table$[[$United$],[$Kingdom$]],\backslash$table$[[35],[$Days$]],3$ Days,$\backslash$table$[[5],[$Days$]],7$ Days,$14$ Days,$10$ Days,$\backslash$table$[[375],[$Days$]],10$ Days$],[\backslash$table$[[$United$],[$States$]],\backslash$table$[[15],[$Days$]],2$ Days,$\backslash$table$[[5],[$Days$]],6$ Days,$30$ Days,$7$ Days,$\backslash$table$[[115],[$Days$]],40$ Days$]]$

Keeping $W_{US}$ at $$20/$day and keeping the exchange rate at $$\frac{2}{}1($which means $1=$$$2),$

a$.$ If trade is taking place between the two countries, the "lower limit$"$ to U$.$K$.$ wage rate per day is pound $($keep $2$ decimals$).$

b$.$ If trade is taking place between the two countries, the "upper limit$"$ to U$.$K$.$ wage rate per day is pound.