Dear dr tamer, We just want to clarify what we have been going through during the past semester regarding the concrete design , at the beginning of the semester there was so many corruption in in arranging the tutorial to be after the lecture , the second thing that we have a complain regarding Dr hussain okail that he doesn't show up except for the lecture time , he is not co-operative with us , there is no co-ordination with the professor and the T.A which put us in confusion . After our experience with him in the structural analysis last semester ( more than half of the students failed ) we asked him to make the assignments and questions we take in lecture or tutorial harder so that we don't get surprised in the final but just like the last semester we took during the semester average question to work out and in the final we were surprised by a question that weigh 55% of the exam which was totally new and the third question 19% containing part that we did not take . I would also like to mention that the while 90 students group of architecture took private classes to be able to enter this exam ( we complained at the beginning of the semester) and though it was useless Thank you, 4th semester students