hi , i need help in answering these question

please only answer if you know it and 100% sure of the answer

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question 1 ( estimation techniques)

The multiple regression model is given as follows: Y = a + ₁X₁ + ₂X₂+_t

Y = Sales revenues per year in millions of dollars

X₁ = Marketing expenditure in millions of dollars

X₂ = Quality control spending in millions of dollars

_t = disturbance term

Regression equation: Y = 15.7 + 1.885X₁ + 1.925X₂+_t

while p-value for X₁ = 0.0003 and p-value for X₂ = 0.1047

a) Interpret the meaning of coefficients and p-values for each independent variables from the above equation

b) Estimate the sales revenues when the marketing expenditure is $15 million and quality control spending is $4.5 million

c) If the R-square value = 0.6454. Interpret the meaning of this R-square!

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