J. The area of a region under a curve is greater than the area of an inscribed rectangle and less than the area of a circumscribed rectangle. Intuitivelv, we understand that somewhere \"between" the inscribed and circumscribed rectangles there is a rectangle whose area is precisely equal to the area of the region under the curve: \\inta"bleftlx\ ight}dx=ftleftlc\ ight)\\leftlb'a'tright} The average value of a function on the interval \\Ieft[a;lcb\ ight] is determined by Average value = r15 I: f(:t}dm The efciency e {in '56 ll of an automobile engine is given by g : [[3533 D433 , where s is the speed [in kmfhl of the car. Find the average efciencv with respect to the speed for a : 3{[a]} kmfh to 3 = 3{[d]} kmr h. Round the answer to one decimal place. Example: if {[a]} = 4, then s : 34th. and if {[d]} = 5 ,then 3{[|:l]} = 351th