DECLARATION This research is my original work and has not been presented to any other examination body. No part of this research should be reproduced without my consent or Stella Maris Mtwara University College. Name: ……………………… Sign: ………………………. Date: …………………..... APPROVAL BY THE SUPERVISOR. This research report submitted for examination credit with my approval as Stella Marris University college. Supervisor name ............................................ Signature......................... Date ........................... COPYRIGHT All rights reserved. No part of this research report may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, photocopying, mechanical, recording or otherwise, without the prior written permission of the author or that of Stella Maris Mtwara University College. DEDICATION This is dedicated to my parents Mr&MrsMussa for encouraging me much, I real appreciate them ...