Given below are hypothetical figures in regard to population (in crores) of two countries A and B during the last three decades.

Country	1971	1981	1991
A	6.4	9.6	10.6
B	15.7	15.7	15.3

Fill in the blanks:

(a) The rate of growth of population of country …………..has declined between years……………and .........................

(b) The country ................... shows negative population growth between years ................ and ....................

(c) The country ............. shows zero population growth between years ........... and ...............