Given the demand function p = 400e -9/24, find the value for the elasticity of demand, n when q = 12. Determine whether demand is elastic, inelastic, or has unit elasticity for q= 12. O a) When q = 12, n = -0.769 and demand is elastic. O b) When q = 12, n = -2 and demand is elastic. O c) When q = 12, n = -1.43 and demand is elastic. O d) When q = 12, n = -1 and demand has unit elasticity.