Suppose that convection ovens are a normal good. Suppose that the income of households decrease, while at the same time there is a reduction in the cost of inputs for convection ovens. As a result of these simultaneous changes, the demand curve for convection ovens will ________ while the supplv curve for convection ovens will _______ . shift to the left; shift upwards {to the left) shift to the right; shift upwards {to the left) shift to the left; shift downwards {to the right) shift to the right; shift downwards {to the right} shift to the right; remain unchanged shift to the left; remain unchanged