$3.\backslash ((15\backslash \%)\backslash )$ Answer the following questions based on the graph below that represents J$.$R$.\text{'}\text{'}$s demand for ribs per week of ribs at Judy's rib shack.

a$)$ How much is consumer surplus, producer surplus, and total surplus at the equilibrium price?

b$)$ If the government imposes a tax on ribs at $\backslash (\backslash$$ $5\backslash )$ each, how much is the change of consumer surplus, producer surplus, and total surplus