Select the correct description for each number set.(4 points)

a) (25−−√, 9, −−−√64−−√
)

b) ( -2.4, 0, 3.1, 81−−√
)

c) (−23, 79, π2
)

d) (12−−√, 11−−√, π
)
Tell me which ones are ONLY RATIONAL NUMBERS, ONLY IRRATIONAL NUMBER OR BOTH RATIONAL AND IRRATIONAL