Can someone please help me with this problem?

Ineed the answers for these promblems i have

Which of the following are guidelines to follow for obtaining accurate observations

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.