Three roommateslong dashtinker, evers, and chancelong dashshare an apartment. it is really cold outside and they are considering turning up the thermostat in the apartment by 1, 2, 3, or 4 degrees. their individual marginal benefits from making it warmer in the apartment are as follows:

- tinker evers chance

1 degree $20 $16 $12

2 degrees $16 $12 $8

3 degrees $12 $8 $4

4 degrees $8 $4 $0

they know that each time they raise the temperature in the apartment by 1 degree, their heating bill goes up by $32.

to maximize social benefit, they should raise the temperature by

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