Hubert is a stay-at-home parent who lives in New York City and teaches tennis lessons for extra cash. At a wage of $35 per hour, he is willing to teach 4 hours per week. At $45 per hour, he is willing to teach 8 hours per week. Using the midpoint method, the elasticity of Jake’s labor supply between the wages of $50 and $65 per hour is approximately ___ , which means that Jake’s supply of labor over this wage range is ___ .