you have been hired by a large public school system to construct a musical aptitude test. Describe how the following concepts would be utilized in constructing the test or relate to the scenario. Standardization, contact validity, predictive validity, reliability and Gardners theory of multiple intelligence

A. describe the model of urban structure most often observed in mega-cities in developing countries. explain how this model differs from common urban structures in north america. b. describe at least two factors leading to the growth of mega-cities in developing or least-developed countries. c. identify and explain two factors that led to the formation of squatter settlements in mega-cities in developing countries.