Let f$($x$)=2$x$-$x$2+1$

a$)$Find slope of f$($x$)$@x$=2$using f$\text{'}(2)=$limx$2$f$($x$)-$f$(2)$x$-2$

b$)$Find slope of f$($x$)$@x$=2$using f$\text{'}($x$)=$limn$0$f$($x$+$h$)-$f$($x$)$h

c$)$Find equation of tangent line to f$($x$)$@x$=2.$