Juanita is a college student who lives in Miami and provides math tutoring for extra cash. At a wage of $40 per hour, she is willing to tutor 7 hours per week. At $50 per hour, she is willing to tutor 10 hours per week. Using the midpoint method, the elasticity of Juanita's labor supply between the wages of $40 and $50 per hour is approximately , which means that Juanita's supply of labor over this wage range is .