Hi, i am confused how to calculate alpha and beta if rho is 1/3. thanks a lot

Consider an exchange economy with 2 consumers whose preferences and endowments are represented by: u'(x1, x2) = [(11) + (x-2)]1/P and e' = (8+a, 11+b) u*(x1, x2) = [(21) + (x2) 1/P and e2 = (10 a, 4 b) where a (-8, 10 and b (-11,4). Consider the allocation i given by ? = (12, 10), x2 = (6,5) (a) Assume p = 1/3. Find the demand function/correspondence of consumer 1 as a function of a and b