A dimension 25mm is to be produced on a component. For inspection, four batches of 3 components each are taken. The observation made are given below:

Batch	A	B	C	D
Component 1	25.10	24.60	25.41	24.50
Component 2	24.90	25.20	25.15	24.94
Component 3	25.30	24.90	25.60	24.93

If the standard deviation of the dimension is 0.280 Plot the X chart and R chart. Take $A_2 = 0.58, D_3= 0, D_4= 2.11$