he optimal amount of x1, x2, P1, P2 and income are given by the following:

x subscript 1 equal fraction numerator 2 I over denominator 7 P subscript 1 end fraction space space space space space space space space space space x subscript 2 equal fraction numerator 5 I over denominator 7 P subscript 2 end fraction
The original prices are: P1=19 P2=19
The original income is: I =2,592
The new price of P1 is the following: P1'=41
Assume that the price of x1 has changed from P1 to P1'. What is the income effect?