From the following data, estimate the population for the year 1986 graphically.

year	1960	1970	1980	1990	2000
Population (in thousands)	12	15	20	26	33

Find the number of men getting wages between Rs. 30 and Rs. 35 from the following table.

Wages (x)	20 - 30	30 - 40	40 - 50	50 - 60
No. of men (y)	9	30	35	42

Estimate the population for the year 1995.

year (x)	1961	1971	1981	1991	2001
population in thousands (y)	46	66	81	93	101

Using Lagrange's formula, find the value of y when x = 42 from the following table

x	40	50	60	70
y	31	73	124	159

Using Lagrange's formula and y(x) from the following table.

x	6	7	10	12
y	13	14	15	17