penditure (i.e. ensures
that the cost of the funded actions do not exceed the budget).
Constraints (eqn 1d) calculate the probability that each feature
will go extinct according to their allocated project.
Constraints (eqn 1e) ensure that feature can only be allocated to projects
that have all of their actions funded. Constraints (eqn 1f) state that each
feature can only be allocated to a single project. Constraints (eqn 1g)
ensure that a project cannot be funded unless all of its actions are funded.
Constr