4. Fill in the code so it adds all integers inputted by the user until the number -1 is inputted & then displays that sum (without the -1 added to the sum.) Also trace your code assuming the user inputs the values 4, 3, 1, -1 sum = 0 sum num
num =

while ( ):

num = int(input("Enter a positive integer (-1 to quit): "))



print(

Which of the following best describe how the depth-limited search works. a normal depth-first search is performed but the number of ply/depths is limited. a normal breadth-first search is performed but the number of ply/depths is limited. a normal breadth-first search is performed but values above a specific value will be ignored. a normal depth-first search is performed but values above a specific value will be ignored.