Suppose fingerprints have the same statistics outlined in 3.8.2, but we use a base family of…

Suppose fingerprints have the same statistics outlined in  3.8.2, but we use a base family of functions F _ defined like F, but using only two randomly chosen grid squares. Construct another set of functions F _ 1 from F _ by taking the n-way OR of functions from F _ . What, as a function of n, are the false positive and false negative rates for F _ 1 ?