An object is dropped straight down from a helicopter. The object falls faster and faster but its acceleration (rate of K change of its velocity) decreases over time because of air resistance. The acceleration is measured in ft/sec2 and recorded every second after the drop for 6 sec, as shown. Find the following estimates. 0 2 3 4 5 6 a 32.00 19.41 11.77 7.14 4.33 2.63 1.59 a. Find an upper estimate for the speed when t = 6. ft/sec