Question 4 please

Question 4 is based on Q2's information (Answer is $959.6 for Q2 and 0.517% for Q3)

2. What is the no-arbitrage price today of a risk-free bond with remaining term of 8 years, $1000 face-value and 4% coupon rate, if coupon payments are made twice a year, and a coupon was just paid yesterday? 3. What is the YTM of the bond from Q2, in percentage terms? Be extra precise. 4. Assume now that the bond from Q2 is risky, with a rating of A, and that the credit spread for bonds rated A is currently constant at 1% for all terms. What is the no-arbitrage price of the bond today