Compute the direct beam insolation on a clear day falling on a collector located in Abu Dhabi on July 15th , at 10:30 am. (local clock time) for the following scenarios : a) If the collector is titled at 25 and oriented towards south b) If the collector is tipped up vertically and pointed 45 east of south. c) Ifthe collector is tilted at 40 and pointed 45 west of south. d) Compare and Comment