i have no idea what this is asking. my teacher grades for accuracy then teaches it. please help im so lost

For the reaction shown below, the data depicted in the given chart were obtained. For each solvent, the average of eight GC integral measurements were determined. When looking at the results, a) which solvent leads to the highest reaction rate? b) Which solvent leads to the lowest reaction rate? c) Why are the error bars for some solvents higher than for others? Please speculate. d) What could you do experimentally to narrow the width of the error bars? Please explain two suggestions. Solvents: EtOH = Ethanol, iPrOH = isopropanol, tBuOH= tert.-butanol, MEK= Methy Ethyl Ketone