(This continues questions 8 and 9.) Let Yi be the response of subject i. According to a multiple regression model, given the assignments, Yi = α+Xiβ+wiγ +i, where wi is a vector of personal characteristics for subject i (question 8); α, β are scalar parameters, γ is a vector of parameters, and the i are IID with mean 0 and variance σ2. Does randomization justify the model? If the model is true, can you estimate the response if a subject with characteristics wj is assigned to treatment at level 75? Explain.