this is a full question no graphs or any other materials were given to me just this question please solve it i need it urgently....

Q3. Suppose that the production function for a crop is given by y = x9-5x9.3 a. Set up a Lagrangean optimization problem using this production function. Derive first order conditions. b. Suppose that the output, y, sells for $4.00 per unit and that x] and x2 both sell for $0.10 per unit? How much x1 and x2 would the farmer purchase in order to maximize profit