Please solve both problems$-$

$5-53.$ If d$=0\mathrm{.}75$ft and the spring has an unstretched

length of $1$ ft $,$ determine the force F required for equilibrium.

Prob. $5-53$

$5-54.$ If a force of F$=50$lb is applied to the pads at A

and C$,$ determine the smallest dimension d required for

equilibrium if the spring has an unstretched length of $1$ ft $.$