The network diagram of a project with six activities is presented below. Start A A B...

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The network diagram of a project with six activities is presented below. Start A A B D E F D most likely B 9 11 7 9 11 6 E The estimated optimistic, most likely, and pessimistic times of each task are given in the table below. Some of the expected times and variances are given and others are marked by xx, yy, or zz, which are irrelevant to the questions. optimistic pessimistic Expected time variance 8 11 7 16 5 9 8 13 9 15 4 8 F XX End yy 9.500 11.333 6.000 XX yy 25/36 36/36 16/26 (1) What is the expected activity time of activity B? (2) What is the variance of the activity time for B? (3) What is the expected length of path D-E-F? (2) What is the standard deviation of the length of path D-E-F? ] [Three decimal places] 1/36 (integer; only enter the numerator value; denominator is always 36) |[Three decimal places] | [Three decimal places] The network diagram of a project with six activities is presented below. Start A A B D E F D most likely B 9 11 7 9 11 6 E The estimated optimistic, most likely, and pessimistic times of each task are given in the table below. Some of the expected times and variances are given and others are marked by xx, yy, or zz, which are irrelevant to the questions. optimistic pessimistic Expected time variance 8 11 7 16 5 9 8 13 9 15 4 8 F XX End yy 9.500 11.333 6.000 XX yy 25/36 36/36 16/26 (1) What is the expected activity time of activity B? (2) What is the variance of the activity time for B? (3) What is the expected length of path D-E-F? (2) What is the standard deviation of the length of path D-E-F? ] [Three decimal places] 1/36 (integer; only enter the numerator value; denominator is always 36) |[Three decimal places] | [Three decimal places]

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To calculate the expected activity time and variance for activity B we can use the formula for expec... View the full answer