${\mathrm{BF}}_3, {\mathrm{PF}}_3, {\mathrm{CF}}_4, {\mathrm{SiF}}_4, {\mathrm{PF}}_5$. How many can neither act like a Lewis acid nor like a Lewis base

${\mathrm{BF}}_3$ ….  Lewis acid …… less than octet
${\mathrm{SiF}}_4$  ….  Lewis acid …… can expand octet
${\mathrm{PF}}_5$ ….  Lewis acid …… can expand octet
${\mathrm{PF}}_3$ ….  Lewis base …… contains a lone pair on central atom, can also act as Lewis acid due to availability of vacant d-orbital.
${\mathrm{CF}}_4$ ….. Not a Lewis acid …… cannot expand valency.
${\mathrm{CF}}_4$ ….. Not a Lewis base …… No lone pair on central atom.