1.The difference between the third and first terms of a Geometric Progression (G. P) is 42. If the fourth term is greater than the second term by 168, find the fourth term of the distribution. 2. If the second and fourth terms of a G. P. are 8 and 32 respectively, what is the sum of the first four terms? 3.Given the ordered data set 17, 22, 26, 29, 34, x, 42, 67, 70, y, has a median of 35. Find x. 4.An operation * is defined on the set of real numbers by x * y = x + y – 2xy. If the identity element is 0, find the inverse of element P under