Just need the objective and constraints for this problem for LP.

Farmer Jones must determine how many bushels of corn and wheat to plant this year. An acre of corn yields 10 bushels of corn and requires 4 hours of labor per week. An acre of wheat yields 25 bushels of wheat and requires 10 hours of labor per week. All wheat can be sold at $4 a bushel, and all corn can be sold at $3 a bushel. Seven acres of land and 40 hours per week of labor are available. Government regulations require that at least 30 bushels of corn be produced during the current year. Let X1 be the number of bushels of corn planted and X2 the number of bushels of wheat planted. Using these decision variables, formulate an LP whose solution will tell Farmer Jones how to maximize the total revenue from wheat and corn.