Which EWMA chart below will yield ARL performance most close to that of cusum chart with k=1/2 and h=5?   a. L=2.814, lamda=0.10 b. L=2.615, lamda=0.05 c. L=2.998, lamda=0.25 d. L=3.054, lamda=0.40 e. L=2.962, lamda=0.20

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