need help with formulars calculating this

1)Suppose the 30-day T-Bill rate is 5% and the expected return of the market is 9%. If the Beta of NIO companys stock is 0.48 what should be the required rate of return of the stock? (Round your answer to 2 decimal points)

2) Suppose you invested in the following stocks, how long you held the in your portfolio and their corresponding return are as follows:

Stocks Invested amount Held for Return Walmart $898 2 years 8% Best Buy $407 4 years 4% Netflix $671 4 years 9%

What is the average return of your total investments? (Round your answer to 2 decimal point)