Control chart for Xbar and R are kept on the weight in kilograms of a color pigment for a batch process. After 25 subgroups with a subgroup size of 4, total Xbar = 52.08 kg, and total R = 11.82 kg. Assuming the process is in a state of control, compute the Xbar and R chart central line and control limits for the next production period. O Xdoublebar = 2.18 kg Rbar = 0.67 kg UCLxbar = 2.43 kg LCLxbar = 1.94 kg UCLR = 1.28 kg LCLR = 0 kg Xdoublebar = 2.08 kg Rbar = 0.47 kg UCLxbar = 2.43 kg LCLxbar = 1.74 kg UCLR = 1.08 kg LCLR = 0 kg Xdoublebar = 2.38 kg Rbar = 0.47 kg UCLxbar = 2.13 kg LCLxbar = 1.74 kg UCLR = 1.58 kg LCLR = 0 kg Xdoublebar = 2.68 kg Rbar = 0.67 kg UCLxbar = 2.63 kg LCLxbar = 1.64 kg UCLR = 1.68 kg LCLR = 0 kg