how do we calculate the level of autonomous spending and the multiplier

Autonomous Consumption = 465 Marginal propensity to consume = 0.6 Autonomous Investment =295 Government expenditure = 450 Exports = 225 Imports = 130 + 0.1Y T = 0.2Y Yf = 2 237.9 Show all calculations: Q.1.1 Calculate the level of autonomous spending in this economy. Q.1.2 Calculate the size of the multiplier. Q.1.3 Calculate the equilibrium level of income. Q.1.4 Calculate the tax revenue to the government of this country when the economy remains in equilibrium. Q.1.5 Calculate what the equilibrium income should be if the government of this country decides to cancel all taxes, implying the tax rate would now be 0%. Q.1.6 Calculate the change in government spending required to reach full employment in the economy