For which weight range are pediatric$-$specific backboards typically designed?

$5$ kg $(11$ lbs$.)$ to $40$ kg $(88$ lbs$.)$

$10$ kg $(22$ lbs$.)$ to $60$ kg $(132$ lbs$.)$

$15$ kg $(33$ lbs$.)$ to $50$ kg $(110$ lbs$.)$

$2$ kg $(4\mathrm{.}5$ lbs$.)$ to $20$ kg $(44$ lbs$.)$