Alpha's balance-of-payments data for 2016 are shown below. All figures are in billions of dollars. What are the (a) balance on goods, (b) balance on goods and services, (c) balance on current account, and (d) balance on capital and financial account? Goods exports Goods imports Service exports Service imports Net investment income Net transfers Balance on capital account Foreign purchases of Alpha assets Alpha purchases of assets abroad $+40 -30 +15 -10 -5 +10 0 +20 -40