Question 4and 5 plz this a test i need

Someone me! if you’re smart you can solve this!

5. (03.02)if g(x) = x2 + 3, find g(4). (2 points)1619811

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.