Storage temperature and storage time are the most important factors in preserving vitamin C in a frozen food item during its storage process. Experiments have proven that the degradation of this important vitamin in frozen food can be expressed mathematically by a first-order reaction equation. The results shown below show the relationship of constant change of reaction rate (k) with storage temperature (T). k (day)" T (c 0.06 0.04 0.03 2.10 -1.26 -3.82 -7.04 -12.58 -17.89 0.02 0.01 0.005 The above experimental results have been used to plot the constant change of the reaction rate with the reciprocal of the absolute temperature on a semi-logarithmic graph paper, a) Using the semi-logarithmic graph and the appropriate form of the Arrhenius equation. Calculate the value of the activation energy (Ea) for the degradation of vitamin C and the value of the frequency coefficient (B) with units being explaining. b) If the initial concentration of vitamin C in the frozen food item is 100 mg vitamin Clg of the frozen food item. Calculate the maximum storage time of the food at two temperatures (-1, -15 C) to obtain a final concentration of the vitamin equal to 30 mg vitamin C/g of a frozen food substance