Water traveling along a straight portion of a river normally flows fastest in the middle, and the speed slows to almost zero at the banks. consider a long straight stretch of river flowing north, with parallel banks 40 m apart. if the maximum water speed is 3 m/s, we can use the sine function, f(x) = 3 sin(πx/40), as a basic model for the rate of water flow x units from the west bank. suppose a boater would like to pilot the boat to land at the point b on the east bank directly opposite point a. if the boat maintains a constant heading and a constant speed of 5 m/s, determine the angle at which the boat should head. (round your answer to one decimal place.)