Suppose the demand for ethanol is now given by the function Q $=46\mathrm{.}1-20$P$.$ What do you predict will be the long$-$run equilibrium price of ethanol, assuming no changes in costs?

a$)$ $$1\mathrm{.}18$ per gallon

b$)$ $$1\mathrm{.}13$ per gallon

c$)$ $$1\mathrm{.}04$ per gallon

d$)$ $$1\mathrm{.}06$ per gallon