Please help! I've been struggling with all four of this questions. Please show work and give final answer in decimal form.

Let f (.r) = .rr'J'. Find the left and the right endpoint approximations of the area A ( R ) of the region R bounded by the graph, 1; = f (.',I) and the Faxis for .'I in [0.1] using points I' = 0 J'1=0.25J 3:0.5 J';1=0.T- MaHdI1=L It L1 and R1 denote the left and the right endpoint approximations, respectively, please enter R1 L1 as your answer in decimal form with three significant digits after the decimal point. Let f (a) = sin + 1. Find the left and the right endpoint approximations of the area A ( R) of the region A bounded by the graph, y (a ), and the X -axis for a in 7 , using points To = 0, 271 571 X1 = = ,l'3 = 7 3 0'5 = and X6 = 7. If L6 and 6 denote the left and the right endpoint approximations, respectively, please enter R6 - L6 as your answer in decimal form with three significant digits after the decimal point.Let f (x) = 202 1. Find the left and the right endpoint approximations of the area A ( R) of the region A bounded by the graph, y = f (a ), and the T-axis for X in 1 , 4 , using points To = 1, 1 = 1.5,x2 = 2,23 = 2.5,24 = 3, = 3.5, and 26 = 4. If L6 and 6 denote the left and the right endpoint approximations, respectively, please enter - L6 as your answer.Let f (.r} = V'l .23. Find the left and the right endpoint approximations of the area 4 ( R) of the region R bounded by the graph (1 f (.1), and the Faxis for .1 in [0.1] using points .'Iu = 0 :11: 0.25 J'..I-_3 = 0.5 )..l;; = U.T-)..l_1=1.lf L; and 1?; denote the left and the right endpoint approximations, respectively, please enter L; R; as your answer in decimal form with three significant digits after the decimal point