Singular Points of Reducible Sextic Curves

Figure 23

𝑎=1; 𝑏=3/2; 𝑐=2, 3, 4, 5, 6 and 𝑏=2; 𝑐=5/2, 3, 7/2, 4, 9/2, 5 and 𝑏=5/2; 𝑐=3 and 𝑏=3; 𝑐=7/2, 4, 9/2.