Government spending in Robok is $125 billion, and its only tax is an income tax with a marginal tax rate of 0.25. a. The balance on the government's budget at a GDP level of $440 billion is a [(Click to select) v] of $ billion. b. The balance on the government's budget at a GDP level of $740 billion is a [(Click to select) v ] of $ billion. c. At what level of GDP will the economy of Robok have a balanced budget? Robok will have a balanced budget at a GDP level of $ billion