Prob.#$4($Text Prob. #$10\mathrm{.}6-1($c$)($check Limiting case, $b=0))$

$(20$ Points$)$

$10\mathrm{.}6-1.$ Locate shear centers of the cross sections shown, in terms of the given dimensions. Each section is thin$-$walled and open, of uniform thickness $t,$ and symmetric with respect to its horizontal centerline. Assume frictionless contact along an overlap $[$parts $($c$)$ and $($h$)].$ Where possible, check answers by examining limiting cases $($as by letting $b$ approach zero, for example$).$