This week's task was a very difficult one and to make it even more difficult you can tell the candidates were running low on energy.

One thing that is never made clear to the public is the time scales you have to work to on The Apprentice.

A typical timescale would be a two or three day task, one day for the boardroom and then another two or three day task, then another boardroom and again.

During this whole process the candidates will have been lucky to get one or two days off during the whole series.

To make that even more challenging the usual day begins at between 5am and 5:30am when the camera crews turn up and finish at anything from 10pm or in some cases 2 or 3 in the morning.

As you can imagine, you soon start to run on empty - while I was there I lost 2 stone in weight.

The fact that we didn't get any food during the tasks didn't help.

So even though on the face of it, it looked like Michael had just taken leave of his senses, it was more likely he just ran out of energy completely, baring in mind he had just done 3 boardrooms in close succession, he had definitely not got any rest at all.

The task itself was difficult but as I have said on a few occasions this series some fundamental business principles have not been applied.

The teams had been told they were to sell at Canary Wharf during the early evening but they had the run of London during the day.

The other major principle was the product selection.

They had a number of supercars to choose from, from a Ferrari to a Zonda and everything in-between.

Personally I'd have thought about the kind of people who would want to hire those cars for a day.

A good idea might have been to think about professional footballers - they would definitely have a few grand to spend on one for the day.

I'm sure if they had turned up at Arsenal's training ground before training and Chelsea or Tottenham's after training with the Zonda they'd have made a fortune.

After all, there are only 15 of those in the country so even the boys who have most of the toys probably don't have one of those.

Michael decided to go to Harrod's, one of London's top tourist destinations, and then to a fruit and veg market with a Ferrari.

The other team led by Lee - and yet again hindered by Lucinda - found better locations and Lee and Alex managed to sell well.

The boardroom was an interesting one and even though Michael had to go, I was yet again surprised that Helene managed to stay in.

She doesn't seem to have done a great deal and openly admits that she can't sell.

I always thought saying that was a red rag to a bull to Sir Alan.

In summary some basic business principles have been ignored throughout this series.

For example: identify your target audience; select your products accordingly; think about your price point; select your location wisely; then allocate roles and responsibilities to your team to make them effective.

Let's hope the final 5 are better at interviews than they have been at the tasks.