considering #3 is correct, i need help with # 4 & #5. please help & iwill give thumbs up

The US Treasury is conducting an auction for $1.8 billion of 90-day US Treasury Bills. What is the market-clearing price based on the following competitive bids? Using the information from the prior problem, please calculate the winning price assuming there is also a non-competitive bid of $1 billion. Question 5 What is the discount rate implied by the price in the scenario with the competitive bidder