Sent you an email but thought i'd post here as well so others can use or abuse ...
1. I get about 9,500 ft for this one. I just did it on the "wiz wheel" circular slide ruler thingy. Not sure of the math involved but I did know the math 10 years ago when i first studied my airline subjects.
2. This is the rule from ICAO documents:
ISA -15 to ISA -30 deg = add 10% to the MEA
< ISA -30 deg = add 20% to the MEA
so your answer would be to add 10% to the MEA.
3. SSB is "Single Side Band". It's used in radar and more frequently in HF radios. Not knowing much about the physics of radio waves what I do know i'll try and explain:
Sidebands are created whenever a carrier wave is modulated by a frequency lower than itself. If the carrier frequency is Amplitude Modulated (AM) at 500 Hz with an audio tone of 2 Hz, 2 sidebands are created, one will be at 498 Hz, the other at 502 Hz, with a 4 Hz split between the 2 sidebands. The carrier signal does not carry any info, it is the sidebands that carry the information. Because there are 2 of them, and are mirror images of each other, only one side band needs to be sent. By sending this Single Side Band (SSB) either more power can be used to send it and bandwidth saved, or power can be saved.
Summing up, Transmission is better because more power can be used to tranmsit the signal in a narrower bandwidth.
4. TAT=SAT + RAM rise. therefore the answer would be -40.
WP