Which of the following accurately defines the government purchases multiplier and the tax multiplier? (note: the symbol upper delta represents "change in.") a. the government purchases multiplier equals startfraction upper delta in equilibrium real gdp over upper delta in government purchases endfraction and the tax multiplier equals startfraction upper delta in equilibrium real gdp over upper delta in taxes endfraction b. the government purchases multiplier equals startfraction upper delta in government purchases over upper delta in equilibrium real gdp endfraction and the tax multiplier equals startfraction upper delta in equilibrium real gdp over upper delta in taxes endfraction c. the government purchases multiplier equals startfraction upper delta in government purchases over upper delta in equilibrium real gdp endfraction and the tax multiplier equals startfraction upper delta in equilibrium real gdp over upper delta in taxes endfraction d. the government purchases multiplier equals startfraction upper delta in equilibrium real gdp over upper delta in government purchases endfraction and the tax multiplier equals startfraction upper delta in taxes over upper delta in equilibrium real gdp endfraction