I don't understand these questions

1)Using CAPM, calculate the following Reasonable Rate of Return for Company QWE, whose Beta is .88.The Risk-free rate of return is 0.75% and Market-rate is 4.75%.

2)What is a portfolio's beta with the following:

StockStock WeightBeta

Apple38%1.50

Target15%1.44

Disney27%1.15

Walmart20%1.20

3)What is a portfolio's beta with the following:

StockStock WeightBeta

Samsung20%1.09

CVS15%0.97

Walgreens31%0.32

Amazon19%1.27

Sony5%0.86

JetBlue10%-0.21

4)What is Holding-period return?