Perform the following unit conversions.

a) [[$ 2 $]] m[[$ ^2 $]] = cm[[$ ^2 $]]

b) [[$ 3.5 $]] m[[$ ^2 $]] = dm[[$ ^2 $]]

c) [[$ 5 $]] ha = m[[$ ^2 $]]

d) [[$ 14 $]] dm[[$ ^2 $]] = mm[[$ ^2 $]]