$1.$ What effect does incorporating incorrectly labeled data or data from unknown sources have on the effectiveness and precision of machine learning models across different fields? $(5$ Marks$)2.$ What are the primary reasons for inaccuracies in the training and testing phases of machine learning algorithms that could result in incorrect predictions? $(5$ Marks$)3.$ Could you elaborate on frequent errors in creating AI systems that might lead to incorrect connections, such as wrongly identifying specific groups or scenarios? $(5$ Marks$)4.$ What measures should be taken to refine the training and testing processes of machine learning tools for sports broadcasting to avoid errors like the one experienced by Inverness Caledonian Thistle FC$\text{'}$s AI camera? $(5$ Marks$)$