The critical path on a project has four activities. The optimistic, most likely and pessimistic times for each activity are as follows $\_\_\_\_\_\_\_\_\_\_.$ A$)134$ B$)246$ C$)5-79$ D$)3-4-5.$ What is the variance for each activity?

$\mathrm{.}35,\mathrm{.}25,\mathrm{.}25,\mathrm{.}45$

$\mathrm{.}50,\mathrm{.}65,\mathrm{.}65,\mathrm{.}44$

$\mathrm{.}25,\mathrm{.}44,\mathrm{.}44,\mathrm{.}11$

$\mathrm{.}30,\mathrm{.}25,\mathrm{.}35,\mathrm{.}50$