$1$ Data collected at a parking lot indicate that a total of $400$ cars park between $8$ a$.$m$.$ and $5$ p$.$m$.9\%$ of these cars are parked for an average of $3$ hr$,40\%$ for an average of $5$ hr$,$ and the remaining cars are parked for an average of $9$ hr$.$ Determine the space hours of demand at the lot. Blank $1,$ Whole number

$2$ If $8\%$ of the parking bays are vacant on average $($between $8$ a$.$m$.$ and $5$ p$.$m$.)$ above, determine the number of parking bays in the parking lot. Assume an efficiency factor of $0,9.$ Blank $2$ Whole number.

$3$ The owner of the parking lot in $($a$),$ is planning an expansion of her lot to provide adequate demand for the following $3$ years. If she has estimated that parking demand for all categories will increase by $6\%$ a year, determine the number of additional parking bays that will be required.

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