Fill in the blanks using the proper word and complete the statements :
(a) The ………….. in the centre, the ………….. on one side and the on the ………….. other side make a lever of the first order.
(b) The ………….. in the centre, the ………….. on one side and the ………….. on the other side make a lever of the second order.
(c) The ………….. in the centre, the ………….. on one side and the ………….. on the other side make a lever of the third order.
