datafile is attachedI= b0+b1 X1+b2X2+b3X3+uI=InvestmentX1= InflationX2= gnpX3=

datafile is attachedI= b0+b1
X1+b2X2+b3X3+uI=InvestmentX1= InflationX2= gnpX3= interestAll the followings will be done in Excel using
matrix approach.a)Find estimators of all
coefficients ( ^B)b)Find var-cov matrixc)Find variances of all ^B
( estimator of each coefficient)d) Hypothesis Testing:
Test the followings:1)Test Null hypothesisb0=02)TestNull hypothesis
b1=03)TestNull hypothesis
b2=03)Test Null
hypothesisb3=04) TestNull hypothesisb0=b1= b2=b3=b4=05) Test Null
hypothesisb1+b3=06)Test Null
hypothesisb1+b3Questions 456: Please
use two separate methods: F test and Wald test
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