please solve

Period 9 Exercises: Simple Machines - Levers Write answers to the questions below. Show your mathematical steps and the units of the quantities. This sheet with your answers should be turned in at the beginning of Period 10. 1. Balancing problems: a) A 100 cm meter stick is balanced on a fulcrum 10 N 50, cm at the 50 cm mark. A 10 newton weight is placed at the 0 cm mark. Where should you place a 20 newton weight to balance the meter stick? b) Where would you place 15 newtons of weight to balance one 10 newton weight placed at the 20 cm mark