Consider a society with three individuals: Johnny, Roland, and Stevie. The society is planning to implement a policy aimed at reducing lead in drinking water in their small town of Shaw's Creek. Presented below are the utility levels for each individual before and after the policy implementation. Utility Values Before the Policy Johnny: U' = 30 Roland: UR = 4 Stevie: US = 15 Utility Values After the Policy Johnny: U' = 40 Roland: UR = 14 Stevie: US = 18 a. Calculate the society's welfare before the policy for all of the following types of social welfare functions. O Utilitarian o Rawlsian o Egalitarian b. Calculate the society's welfare after the policy for all of the following types of social welfare functions. O Utilitarian O Rawlsian O Egalitarian