Fill in the blanks.
(i) For a given data with 110 observations the ‘less than ogive’ and ‘more than ogive’ intersect at (18, 20). The median of the data is __P__.
(ii) The curve is drawn by taking upper limit of class interval along x-axis and cumulating frequency along y-axis is __Q__ than ogive.
(iii) The mean of 50 number s is 18, the new mean will be __R__ if each observation is increased by 4.
(iv) The mean of seven consecutive natural numbers is 20, then the largest number is __S__ and smallest number of them is __T__.
P, Q, R, S, T