Non-negativity constraints belong to an integer programming model, but not necessarily to a linear programming model

If you hold a portfolio made up of the following stocks:

Investment Value Beta Stock X $4,000 1.5 Stock Y $5,000 1.0 Stock Z $1,000 .5 What is the beta of the portfolio? A) 1.24 B) 1.33 C) 1.00 D) 1.15

A primary key should be null

Indicate whether the statement is true or false