You are given a list of 10 tasks. Each task has a colour (Green,
Yellow or Red) corresponding to its associated risk score and each
task has a due date. The tasks are also weighted differently.
Taking into account the risk, due date / number of days overdue and
the weight of each task, derive a series of formulae which gives a
score for the risk of completing all the tasks and give the final
result a colour (Green, Yellow or Red)