Automation System
Trend analysis:

can improve control system response
is a brand new concept
requires a very expensive system to implement
None of these
is used only in financial planning

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Automation System
D/A (digital to analog) conversion:

must be fed through a filter to reproduce the original signal accurately
results in a binary code as the final output
None of these
has to be sampled at 1/2 the highest input frequency
both (b) and (c)

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