For a $12"$ wide strip, do the following $($Note: steel yield stress $\backslash (=60\backslash$mathrm$\{$ksi$\})\backslash ).$

a$)$ Show that the given reinforcement area is within the acceptable code limits

b$)$ Show that the given bar spacing is within the acceptable code limits

c$)$ Determine the design flexural strength

d$)$ Determine the design shear strength