Please, help me with this problem

Nneeedd 1.find the residual if you know the actual number is 5.2 and the predicted value is 4.8

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

If myesha works overtime, she gets paid "time and a half" for every hour she works. in other words, for every hour over 40 hours myesha works each week, she gets her hourly pay plus half her hourly pay. what is myesha's pay per hour when she works overtime?