Write a logical function isguest to determine if a name is on the guest list of an event. the function should operate independent of upper or lower case characters in the string. a string array contains the guest list. if there are multiple entries of the same name, a single logical must be returned.

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.