3 point for completing every question; -1 if missing any question until whole 3 point are taken off. If missing questions listed below, this point won't get deduct.

hw_lect4_1: 2 point; 1 point for part (a); 1 point for part (b).

hw_lect5_1: 3 points; 1 point for each part based on correction.

hw_lect6_2: 1 points; 0.5 partial if perform standardization but do not have the right answer.

hw_lect6_3: 1 points; 0.5 partial for part (a); 0.5 partial for part (b);