Which of the following are in direct variation or in invese variation? (郦 Tw (6) Number of articles (x) and their cost (v) (i) Distance (x) and time () when speed is uniform (same) (ii) Speed (x) and time () when distance covered is same. (iv) If cost of x pencils is Rs 20 and cost of one pencil is (), is a multiple of25 paise) (v) Number of balls (x) and weight of balls ) (vi) Number of workers (r) to complete a work and number of days (0) to complete the (vii) Number of bricks (x) and their weight ()all bricks are identical] (vii) Weight of guavas is (x) and their cost is Rs 100 and cost of per kg of guava is () [v is a multiple of 4 mpea