Assume every $40m$ exist error $e,$ equators I Istand $2^{nd}$ position of the instrument with difference $A$ & B$.$ Find the error if the distance of level from the point is $200m?(20\%)$

In the given figure, the below points were taken using levelling

a$.$ Find the reduce level of each points $(30\%)$

b$.$ If the Reduce level at Point $J$ is $54,680.$ Calculate the Error and explain if it is acceptable or not? $(10\%)$

c$.$ Evaluate your answer after calculating the error $(10\%)$