The terminology in your question suggests that you might be in the USA or perhaps in an African nation. In the UK (other, possibly, than in Scotland) I'd have expected to see a reference to 'tort', rather than to 'delict'. If so, this clearly isn't the place to be asking your question, as our laws are very different to yours.
Further, we're not too keen on directly answering coursework questions for people. Your first starting point though should be to look up (or google) the definition of 'delict' in your own jurisdiction. (In the USA you'll need to consult references to State law, rather than to Federal law). It will almost certainly include some form of reference to 'negligence', which looks like being a key factor in your argument but you need to find out what else is needed within your state's/country's legal system to show that someone is 'delictually liable'. Here, for example is clear a statement of the 5 factors necessary in South Africa but they might well be different where you are:
http://www.jgs.co.za/index.php/litigation/delict-explained