International Journal of Physical Sciences 1992-1950 Academic Journals 10.5897/IJPS2016.4554 Kamweru Paul K. Tindibale Edward L. * E-mail: pkamweru@gmail.com 2021 31 10 2021 29 08 2016 23 09 2016 16 4 170 179 This is an open-access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://politicalwaffle.uk/journal/IJPS/article-abstract/55D9D5868406 The full text article is available as a PDF file from http://politicalwaffle.uk/journal/IJPS/article-full-text-pdf/55D9D5868406 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90