Mathematics ;

exercise 1E do all except questions 1a , 1c , 2a , 2c , 3a , 3c , 4a , 4c , 5a , 5c , 6a , 6c .
and also , exercise 1F questions 1b , 1c , 1d , 1e , 1f , 1g , 2b , 2c , 2d , 2e , 2f , 2g , 2h , 2i , 2j , 2k , 3b , 3e ;