You observe the spot rate curve as in Table 3. Assume all the interest rates are annual effective and all the bonds pay annual coupons.

Table 3 Spot rate curve
year	1	2	3	4	5	6	7	8	9
Spot rate	3.4%	3.8%	4.02%	?	4.86%	5.2%	5.8%	6.04%	6.1%

Part (a). If a 4-year 8% government bond is current selling at 112, calculate the missing 4-year spot rate. 

Part (b). You plan to purchase a 2-year zero coupon government bond in 6 years. Calculate the expected price at the time of purchase. 

Part (c). You plan to purchase a 3-year corporate bond with a coupon rate of 5%. The issuer is a financial services provider and has a credit rating of BBB. At the time of purchase, you observe the quotes on the yields of different bond indices as in Table 4. Calculate the price of the corporate bond. 

Hint: Use an appropriate credit spread to adjust the spot rate curve in Table 3 then use the adjusted spot rate curve to price the bond. 

Table 4
Index	S&P rating	Yield (p.a.)
Treasury Bond	AAA	4.7%
Semi-Government	AA	4.98%
Composite	BBB	6.24%
Financials	BBB	6.16%
Industrials	BBB	6.30%