1) pay 2) earn
1) cost 2) afford
1) buy 2) sell
1) spend 2) save
ФОТО !!!!!!!!!!!!!!!!!НАДО!!!!!!!!!!!!!!!
1) no; any
2) some
3) some; some
4) any
5) no
1 constant, utility, controlled
2 is assumed, maximise, maximise utility
3 i.e/ in other words
4 specific
5 spending, depends on
6 change
7 per year/ annually, during
1. - модель 3 (как указано).
2 и 4 - модель 1
3 - модель 2