Question 7 5 pts An individual utility function is given by U(x,y) = x-y_/2. This individual demand equation for x is a factor a of I/Px: x* = a (1/Px). In this specific case, factor a is equal to [a]. (NOTE: Write your answer in number format, with 2 decimal places of precision level; do not write your answer as a fraction. Add a leading zero and trailing zeros when needed.)