$1.($a$)$ You are building an ML model that recommends age$-$appropriate shows on Netflix for kids. Choose the specific performance metrics that you would use to measure the effectiveness of your model. Justify the choice. State whether you want the metric value to be high or low.

$($b$)$ Accuracy metrics for $5-$fold cross$-$validation for two different binary classification models are as follows: Model$-1$: $90,81,82,84,85/$ Model$-2$: $83,82,82,83,82.$ Compare the models and identity the model that you would choose for deployment in production. Justify the choice.