Answer:



Step-by-step explanation:
Given

Solving (a): Thousandth
This implies three digits after the decimal
So:
--- Approximated
Solving (b): Tenths
This implies one digit after the decimal
So:
--- Approximated
Solving (c): Unit
This implies no decimal
So:
--- Approximated
Note that: The approximation were done by the approximation rules where 0 - 4 approximates to 0 and others added to 1