$.$ What is the cost function of Logistic Regression? Explain in Detail.

$2.$ What are voting classi ers in ensemble learning?

$3.$ Follow the $7-$steps to model building for your selected ticker,

$($a$)$ produce a model to predict positive moves $($up trend$)$ using Support Vector Machine $($SVM$)$

model.

$($b$)$ tune hyperparameters for the estimator and present the best model.

$($c$)$ investigate the prediction quality using area under ROC curve, confusion matrix and classi ca

tion report.