The table below shows the compound yield curve for each semi-annually of January 1, 2020. Calculate the convexity of the following securities. Face value is $100.

Maturity	Yield	Maturity	Yield	Maturity	Yield
0.25	4.53%	2.75	5.06%	5.25	4.59%
0.5	4.69%	3	5.03%	5.5	4.51%
0.75	4.82%	3.25	5.00%	5.75	4.44%
1	4.91%	3.5	4.96%	6	4.35%
1.25	4.99%	3.75	4.92%	6.25	4.25%
1.5	5.04%	4	4.87%	6.5	4.14%
1.75	5.07%	4.25	4.82%	6.75	4.01%
2	5.08%	4.5	4.77%	7	3.87%
2.25	5.09%	4.75	4.71%	7.25	3.70%
2.5	5.08%	5	4.65%	7.5	3.51%

(a) 4-year zero coupon bond

(b) 2 1/4-year coupon bond paying 6% semiannually

(c) 2-year coupon bond paying 4% quarterly

(d) 3 1/2-year floating rate bond with 30 basis point spread, paid semiannually

(e) 4 1/4-year floating rate bond with 45 basis point spread, paid semiannually