Write the code for mode A using std::partial_sort() to place the k smallest numbers in order at the front of the vector list; Write the code for mode B which uses std::make_heap(),a loop based on std::pop_heap(),and std::reverse() to place the k largest numbers in order at the front of the vector list; Write the code for mode C which, based on the code for mode B, produces output similar to mode A with the k smallest numbers placed in order at the front of the vector list.

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.

which functions return a valid value without any arguments?

(-blank- and -blank- return a valid value without any arguments.)

1st -blank-

today

sqrt

count

2nd -blank-

round

now

sqrt