The solutions in the two arms of this u-tube are separated by a membrane that is permeable to water and glucose but not to sucrose. side a is half filled with a solution of 2 m sucrose and 1 m glucose. side b is half filled with 1 m sucrose and 2 m glucose. initially, the liquid levels on both sides are equal. refer to the figure. initially, in terms of tonicity, the solution in side a with respect to the solution in side b is