Write a grammar for a language whose sentences start with an even and non-zero number of x’s, end with an odd number of z’s, and have a number of y’s in between equal to the total number of x’s and z’s in the sentence. For example, xxzzz is a valid sentence.

Fluids at rest possess no flow energy. a)- true b)- false

An air-conditioning system consists of a heating section and an evaporative cooler. air enters the heating section at 10°c and 70 percent relative humidity at a rate of 30m^3/min, and it leaves the evaporative cooler at 20°c and 60 percent relatively humidity. if the air conditioning system operates at a total pressure of 98 kpa, determine (a) the temperature and relative humidity of the air when it leaves the heating section, (b) the rate of heat transfer in the heating section, and (c) the rate of water added to air in the evaporative cooler

Mention three advantages and two disadvantages of cmm.