The interesting thing here is you don't actually need to know anything about FETs in order to solve the problem. But you do need to know which is the gate, drain, and source.
You are given R1 & R2 voltage divider, 12 volts in, 4 volts out. You are given the parallel equivalent resistance of R1||R2 as 79.4kΩ. That is enough to determine the values of R1 and R2.
You are given the drain current of 6mA from which to calculate the gate-source voltage. Then knowing the gate voltage you find the source voltage. The drain current will be the same as the source current, so knowing the source voltage and source current gives you the value of Rs.
You are given the drain-source voltage = -5V, so subtracting that and the source voltage from the supply voltage of 12V gives the voltage across the drain resistance and knowing the drain current gives you the value of Rd.
I suspect that the currents are negative because the supply voltage is negative.
Anyway, that's how I would try to solve it.