Q

$.$

$3$

: In a BB

$8$

$4$

$$protocol with polarized photons, instead of two basis

$-$

sets making

$4$

$5$

$\backslash$

deg angle, two

basis

$-$

sets, H & T

$,$

$$that are at

$6$

$0$

$\backslash$

deg angle, are chosen.

$($

a

$)$

$$If Alice sends

$4$

n random bits with randomly selected basis

$-$

sets from H & T

$,$

$$how many total

bits will be correctly interpreted by Bob?