Subgroups of 5 item each are taken from a manufacturing process at regular intervals. A certain quality characteristics is measured, and $\bar{X}$ and R values are computed for each subgroup. After 25 subgroups $\sum \bar{X}$ 
=357.50, $\sum R$
= 8.80 Compute control chart limits. All points on both charts fall within these limits. If the specification limits are 14.40 ± 0.40 what conclusions can you draw about the ability of the existing process to produce items within these specifications? Suggest possible ways in which the situation could be improved.
A2 = 0.58, D3 = 0, D4 = 2.ll, d2 = 2.326