Table:
text: Ancient Chinese glass
Chemical composition of Warring States and Han period glasses
Chemical composition of Warring States and Han period glasses
Objects Date_ SiO_2 Al_2_O_3 Fe_2_O_3 K_2_O Na_2_O
Eye bead 4th to 3rd centuries BC 55 2.13 0.62 4.05 7.53
Large bead Han Dynasty 37.2 0.15 0.01 0.02 3.94
Cube shaped bead 4th to 1st centuries BC 51 0.46 0.10 0.084 6.12
Bi disk 3rd century BC 36.8 0.28 0.14 0.16 1.87
`Glass garment` plaque Late Han Dyn 36.03 0.02 0.07 0.07 2.27
Ritual disk Warring States 37.16 0.62 0.16 0.27 3.32

Question: Average SiO 2 for ancient Chinese glass when Na 2 O is 7.53 and when Al 2 O 3 is less than 2.13?

Question: Regarding ancient Chinese glass, what is the highest K 2 O when Na 2 O is greater than 1.87, when Fe 2 O 3 is greater than 0.07, when Objects Ritual Disk is and when Al 2 O 3 is smaller than 0.62?

Question: What is the highest SiO 2 among ancient Chinese glass if K 2 O is greater than 0.16, if Fe 2 O 3 is greater than 0.16, and if Na 2 O is less than 7.53?