Hi, can you help me solve these two standard deviation and density questions? Thank you!

7. [-/12.5 Points] DETAILS WANEFMAC6 P.3.063. MY NOTES Assuming that workers' salaries in your company are uniformly distributed between $25,000 and $50,000 per year, calculate the average salary in your company.8. [-/12.5 Points] DETAILS WANEFMAC6 P.3.066. MY NOTES Investments in junk bonds are declining continuously at a rate of 5% per year. How long will an average dollar remain invested in junk bonds? yr