Prints task information.

            `env`
                Runtime ``Environment`` instance.
            `args`
                Arguments object from arg parser.

def execute(self, env, args):
        """ Prints task information.

            `env`
                Runtime ``Environment`` instance.
            `args`
                Arguments object from arg parser.
            """

        start = self._fuzzy_time_parse(args.start)
        if not start:
            raise errors.FocusError(u'Invalid start period provided')

        stats = self._get_stats(env.task, start)
        self._print_stats(env, stats)