Which of the following are true for all regular languages and all homomorphisms? $($a$)$ h$($L$1\backslash$cup L$2)=$h$($L$1)\backslash$cup h$($L$2).($b$)$ h$($L$1\backslash$cap L$2)=$h$($L$1)\backslash$cap h$($L$2).($c$)$ h$($L$1$L$2)=$h$($L$1)$h$($L$2).$