Solve the initial-value problem using the method of undetermined coefficients. 
Definitions:
Respiratory System
The biological system consisting of specific organs and structures used for gas exchange in animals and plants.
Ectoderm
The outermost of the three primary layers in an embryo, from which arises the nervous system, skin, and various sensory organs.
Neonate Adaptations
Physiological and anatomical changes a newborn undergoes to transition from intrauterine to extrauterine life, ensuring survival outside the womb.
Multiple Births
Multiple births occur when more than one baby is born from a single pregnancy, such as twins or triplets.
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