Two young sumo wrestlers decided to go on a special diet to gain weight rapidly. They each gained weight at a constant rate. The weight (in kilograms) of the first wrestler as a function of time (in months) is given by the following table of values. The graph of the weight (in kilograms) of the second wrestler as a function of time (in months) is shown below. Which wrestler weighed more at the beginning of the diet? Which wrestler gained weight faster?