The municipality of Muscat is planning to build a huge monument, buying marble from the domestic market, which is efficient. An independent study has previously estimated the local demand and supply...

The municipality of Muscat is planning to build a huge monument, buying marble from the domestic market, which is efficient. An independent study has previously estimated the local demand and supply of marble as ??=25−0.2? and ??=−5+?, respectively. If the demand due to this project is expected to change to ??=49−0.2? (the quantity is measured in square meters and the price in dollars):

What is the amount of marble that the project is estimated to purchase, and how much of that amount is bid away from private consumption?