Microeconomic questions: Utility function: U(x,y) = x^0.7 + y^0.7

The questions are given below. Free to choose whatever the numercal example

Given the utility funtion: U(x, y) = x07 + yo.7, find: WWWwwwwwwww a) Set up the Lagrangian equation WWWWWW b) first order conditions for a maximum c)demand function for x and y d)give a numerical example for the prices