I need help with the assignment attached. The assignment is due this evening at 10 pm central standard time

Question 4: Proficient-level: "Calculate the price of a zero coupon bond that matures in 20 years if the market interest rate is 3.8 percent" (Cornett, Adair, & Nofsinger, 2016, p. 185). Assume semi-annual compounding. Distinguished-level: State why zero coupon bonds are sold at steep discounts. Question 5: Proficient-level: "Compute the price of a 3.8 percent coupon bond with 18 years left to maturity and a market interest rate of 6.8 percent" (Cornett, Adair, & Nofsinger, 2016). Assume interest payments are paid semi-annually, and solve using semi-annual compounding. Distinguished-level: Explain why the bond is either a discount bond or a premium bond. Question 6: Proficient-level: "A 5.65 percent coupon bond with 18 years left to maturity is offered for sale at $1,035.25. What yield to maturity [interest rate] is the bond offering?" (Cornett, Adair, & Nofsinger, 2016, p. 186). Assume interest payments are paid semi-annually, and solve using semi-annual compounding. Distinguished-level: Explain what effect a decrease in the offered sales price would have on the yield to maturity