Please answer both parts

Question 5 Homework. Unanswered Installing a solar panel system on your roof comes with a total upfront cost of $19,000 after all tax credits. If the solar panels reduce your utility bill by $900 per year, what is the Payback period of installing the solar panel system? Round to one decimal place. Type your numeric answer and submit Unanswered . 3 attempts left Submit Question 6 Homework. Unanswered A project has an initial cost of $57,000 and is expected to generate a single cash inflow of $73,000 in 6 years. What is its IRR? Round to the tenth of a percent (e.g. 5.6%=5.6). Type your numeric answer and submit Unanswered. 3 attempts left Submit