5. Julianne runs a NFP and needs to decide how many hours to stay open. The table below illustrates her marginal costs of staying open for each additional hour. Hours of operation | Marginal cost 00 12 16 YOUAWN 20 24 28 Table 2.2 Suppose Julianne always earns an additional $3 from staying open one more hour. Using marginal analysis, how many hours should Julianne stay open? a. 0 hours b/ 1 hour C. 2 hours d. 3 hours W 2