During a real estate run-up in 20002008, the value of subprime (normally classied as risky) mortgage debt outstanding in a certain country was approximately 1,550 A(t) = , billion dollars (0 s t s 8) 1 + 4.5(1.9)' t years after the start of 2000. Graph the function as well as its first and second derivatives. Determine, to the nearest whole number, the t-coordinates of any points of inflection. (Enter your answers as a comma-separated list.) f: x Determine, to the nearest whole number, the values of t for which the graph ofA is concave up and concave down. The function is concave up for t What does the point of inflection tell you about subprime mortgages? A'(t) is a minimum at that value oft, meaning that the value of subprime mortgage debt outstanding was increasing fastest in the corresponding year. A'(t) is a maximum at that value of t, meaning that the value of subprime mortgage debt outstanding was increasing slowest in the corresponding year. A'(t) is a minimum at that value of t, meaning that the value of subprime mortgage debt outstanding was increasing slowest in the corresponding year. A'(t) is a maximum at that value of t, meaning that the value of subprime mortgage debt outstanding was increasing fastest in the corresponding year