Please help. Thanks!

Ann generally follows a combination of Paul and Jane's ratings. Ann wants to predict how well she will like the movie Title-6, which Paul and Jane have already seen. Ann reasons as follows: she will give her similarity coefficients and 3 for Paul and Jane respectively. If the missing rating (call it x) were known then the column of Ann's ratings should be the closest in the least-squares sense to the combination of Paul's and Jane's ratings: 2 min -min Determine, , using the first 5 movie ratings, and form that the combination of Paul's and Jane's ratings that is closest to Ann's, in a least squares sense. Use this resulting best combination to infer the induced rating for Ann for Title-6. Should Ann see Title 6'? Is her taste closer to Paul's or to Jane's? Ann generally follows a combination of Paul and Jane's ratings. Ann wants to predict how well she will like the movie Title-6, which Paul and Jane have already seen. Ann reasons as follows: she will give her similarity coefficients and 3 for Paul and Jane respectively. If the missing rating (call it x) were known then the column of Ann's ratings should be the closest in the least-squares sense to the combination of Paul's and Jane's ratings: 2 min -min Determine, , using the first 5 movie ratings, and form that the combination of Paul's and Jane's ratings that is closest to Ann's, in a least squares sense. Use this resulting best combination to infer the induced rating for Ann for Title-6. Should Ann see Title 6'? Is her taste closer to Paul's or to Jane's