An unknown compound,C9H12,gave the following NMR spectrum: Triplet at 1.21 ppm (3H) Singlet at 2.30 ppm (3H) Quartet at 2.60 ppm (2H) Singlet at 7.04 ppm (4H)
What is the structure of the compound? 
Definitions:
Forecast
The process of making predictions about future events or trends based on past and current data analyses.
Smoothing Constant
A parameter used in exponential smoothing methods for time series data to control the degree of smoothing applied to the data.
Forecast
A prediction or estimate of future events or trends, often based on current data and analysis.
Number of Forecast Values
The quantity of data points projected or predicted for future periods based on historical trends and analysis.
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