$\backslash$#$2.[5$ points$]$ The following loop consisting of radial lines and segments of circles, sharing the same center at P $,$ carries $8\mathrm{.}8$ A of current. If $\backslash ($ a$=2\mathrm{.}6\backslash$mathrm$\{$~cm$\}\backslash )$ and $\backslash ($ b$=3\mathrm{.}8\backslash$mathrm$\{$~cm$\}\backslash ),$ calculate the magnitude and direction of the magnetic field at point $\backslash ($ P $\backslash ).$