Broadcast channel. Consider the following degraded broadcast channel.
![2333_b3f6b485-647d-43f4-aef4-305144526b51.png](https://secure.tutorsglobe.com/CMSImages/2333_b3f6b485-647d-43f4-aef4-305144526b51.png)
(a) What is the capacity of the channel from X to Y1?
(b) What is the channel capacity from X to Y2?
(c) What is the capacity region of all (R1, R2) achievable for this broadcast channel? Simplify and sketch.