(a) A tax that would effectively increase the price of residential heating fuel by $1,
(b) A subsidy that would effectively reduce the price of natural gas by $3, or
(c) A tax that would effectively increase the price of electricity (produced by hydroelectric facilities) by $4. To assist you in your decision, an economist in your office has estimated the demand for residential heating fuel using a linear demand specification. The regression results are presented as follows. Based on this information, which proposal would you favor? Explain.