trolley cart scenario

Is it better to harm many people in order to save one or is it better to harm one person in order to save many people? The trolley cart scenario is a very well known conundrum that different people have different perspectives and opinions on. 

If you were in a trolley cart and the carts brakes suddenly wouldn't work and you were going at a very high speed would you if you were given the opportunity pull the lever and switch tracks and save one person but it would result in you harming many others or would you save many others and it would result in you harming one what would you do? 

Many people say that they would sacrifice one person in order to save many others. If we were to change the conundrum slightly and say that there were 5 strangers and  a close friend would you still harm your close friend in order to save 5 people or would your opinion change depending who it was? 

For example, think of yourself as a doctor. There are five people that need organ transplants, one needs a heart, one needs a liver, one needs a kidney, one needs a lung and the other needs a pancreas without the transplant they would die. You happen to have a very unwell patient in the next room that has a perfectly healthy heart, liver, kidney, lung and pancreas would you if you were given the opportunity would you sacrifice that one unwell patient in order to save the five that need the transplants or would you keep the one person alive and let the five that need the transplant die?