The Brake A. Bac Trucking Company requires two workers to unload a truck in 5 hr. Working together,.

The Brake A. Bac Trucking Company requires two workers to
unload a truck in 5 hr. Working together, the two workers have a mortality rate
(due to heart failure) of 0.05 per hour. However, if one experiences a heart
attack and dies while unloading a truck, the other’s mortality rate increases
to 0.2 per hour as a result of the increase in the unloading rate necessary in
order to complete the task on time. Compute the probability (reliability) that
a truck will be successfully unloaded by a two-person crew. What is the
expected time to failure (in working hours) of the two-person crew?