Determine the bias condition for the circuit - i am

Question

I am confused how to establish Vgs. It seems it is given on the datasheet, but then all the literature suggests it needs to be calculated.

Problem 1.

Determine the bias condition for the circuit shown in figure 1.

Component	Value
RG	100 kΩ
RD	1 kΩ
Rgen	50 Ω
RL	2.2 kΩ
C1	0.1 µF
C2	10 µF
Vgg	1 V
VDD	18 V
IDSS(max)	10 mA
IDSS(typ)	3 mA
IDSS(min)	1 mA
Vp(max)	5 V
Vp(typ)	3 V
Vp(min)	1 V

Problem  2. Determine the bias condition for the circuit shown in figure 2.

Component	Value
RG	100 kΩ
RD	1 kΩ
Rgen	50 Ω
RS	1 kΩ
RL	2.2 kΩ
C1	0.1 µF
C2	10 µF
CS	100 µF
Vgg	1 V
VDD	18 V
IDSS(max)	10 mA
IDSS(typ)	3 mA
IDSS(min)	1 mA
Vp(max)	5 V
Vp(typ)	3 V
Vp(min)	1 V

Problem  3. Determine the bias condition for the circuit shown in figure 3.

Component	Value
R1	12 kΩ
R2	1 kΩ
RD	1 kΩ
Rgen	50 Ω
RS	1 kΩ
RL	2.2 kΩ
C1	0.1 µF
C2	10 µF
CS	100 µF
Vgg	1 V
VDD	18 V
IDSS(max)	10 mA
IDSS(typ)	3 mA
IDSS(min)	1 mA
Vp(max)	5 V
Vp(typ)	3 V
Vp(min)	1 V