Which of these is outside of the solar system? sun saturn galaxy moon

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.

Am i correct on these two physics questions?