Give as many methods as you can for the following :
(a) Separating light materials from grain.
(2) Removing weevils from grain.
(c) Picking out stones from grain.
(d) Cleaning grain which has a lot of soil mixed in it.
(e) Cleaning muddy water.
(a) Winnowing
(b) Sifting and picking
(c) Picking
(d) Settling
(e) Filtration