George invests a total of $5000 into various funds on the day his daughter is born. George’s investment balance can be estimated by the function f(t)=5000log100(t+107)−75, where t is time in years since the investment was made. George checks on the investment every 5 years until his daughter turns 20, at which point he presents the investment to his daughter. Part A: During which time period did the account have the largest average rate of change? Assume t=0 on the day his daughter is born. Part B: Interpret your result in Part A. Did George make good investments? Select one answer for Part A, and select one answer that is completely correct for Part B. B: George made bad investment decisions. He lost money over time. A: [0,5] A: [10,15] B: George made disappointing investment decisions. He did not make any money because the investment balance remained the same over each time period. A: [15,20] B: George made excellent investment decisions. The investment balance grew more and more rapidly over time. B: George made moderately successful investment decisions. The investment balance grew over time, but at an increasingly slow rate. A: [5,10]