Creat using MATLAB

Create a row vector named var whose elements are 1, 2, 3, 4, ... 20 a row vector var2 where each element is square of the corresponding element of var a row vector var3 whose element goes like 1, 1/2, 1/3, 1/4, ... 1/20 a row vector var4 whose element goes like -1, 1,-1, 1,-1, 1, ... a row vector vars whose element goes like -1, 1/2, -1/3, 1/4, ... 1/20 a row vector varo whose element goes like 1,-1/2, 1/3, -1/4, - 1/20