How do you plan to solve it?
module vector_splitter(in_vec,out1,out2,out3,out4); input [7:0]in_vec; output [3:0]out1; output [1:0]out2; output out3; output out4; assign out1=in_vec[7:4]; assign out2=in_vec[3:2]; assign out3=in_vec[1]; assign out4=in_vec[0]; endmodule