Assume that a consumer's utility function is u(21, 202 ) = x x, for some a > 0, B > 0. The initial price of the first good (1 ) is p1. Suppose that the price of the first good increases by 50% while the price of the second good and the consumer's income remain the same. How will the consumer's expenditure on the first good change? remain the same O drop by 50% O drop by - 100% increase by 50%