Cecilia's demand function for coffee is a function of the price of coffee (Pc), the price of sugar (Ps) and her income (M). As every economist knows, her demand function is homogeneous of degree zero in prices an income. Suppose the partial elasticity of Cecilia's demand with respect to the price of sugar Ps is equal to -9.5 and the partial elasticity of her demand function with respect to income it equal to 6.3. Enter below the own-price elasticity of Cecilia's demand for coffee, i.e., the value of the partial elasticity with respect to Pc.