Suppose an individual has a fixed amount of wealth to allocate between consumption in two periods (cS1U1B11S1U1B0 and cS1U1B12S1U1B0).Any funds not spent in period 1 will earn interest (at the rate r)which will increase purchasing power in period 2.Consider four possible reactions to an increase in r: I.cS1U1B11S1U1B0 increases. II)cS1U1B11S1U1B0 decreases. III)cS1U1B12S1U1B0 increases. IV)cS1U1B12S1U1B0 decreases. Which of these is consistent with the hypothesis that both cS1U1B11S1U1B0 and cS1U1B12S1U1B0 are normal goods?