Add Tasks Example

__Proposal:__
Make some tasks examples to sum diferentes metrics

__Current behavior:__
Not clear in docs

__Desired behavior:__
some example for tasks

__Use case:__
Create Tasks with the lib

Start by locating the client documentation and any existing task-related examples, then review how tasks and metric aggregation are currently described. Done means the documentation contains a clear example of creating a task to sum different metrics and explains how to use it with this client.

Written by the indexing model from the issue text.