A startup team is interested in creating a productivity app. In estimating the cost of creating the app, they collected sample data and developed the following regression equation:

=8.227+18.172x1+0.623x2+1.752x3

where

x1=number of developers

x2=number of hours spent creating the app

x3=cost of software and testing ($'000)

y=total cost of creating app ($'000)

a.) What is the value ofb2in the equation

b.) Does it make sense to interpretb0in this equation? (yes or no)

c.) Predict the cost of creating an app involving 5 developers, 800 hours and $23,000 in software and testing costs.