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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def getLoadAvg(self):
 """Return system Load Average. @return: List of 1 min, 5 min and 15 min Load Average figures. """

        try:
            fp = open(loadavgFile, 'r')
            line = fp.readline()
            fp.close()
        except:
            raise IOError('Failed reading stats from file: %s' % loadavgFile)
        arr = line.split()
        if len(arr) >= 3:
            return [float(col) for col in arr[:3]]
        else:
            return None