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EXAMPLE 14.7 c4 A batch of 4 axles is to be processed on the following three machines in the sequence: lathe (L), milling (M) and grinding (G). Instead of working on these 4 axles first on lathe, then on milling and finally on grinding in this sequence, it is desired to process the first axle on the lathe and as and when it is processed, it is taken up on milling and the second ale on the lathe, and so on. In other words, each of the three activities L, M and G have been quartered for the sake of concurrent operations. Draw the network for the