How to find the fifth largest value in a matrix

Please output the fifth largest number from a two-dimensional matrix with more than 5 elements and no repeated values.

%%Problem 2 
disp('PROBELM 2')
disp('Random matrix A')
A=rand(3,3)
B=unique(A)

I am stuck after making the matrix. Any help would be appreciated.

Answer 1

[madhan ravi]

Hint: https://www.mathworks.com/help/matlab/ref/maxk.html

[Sarah Hicks]

I am still confused on how to find, specifically, the fifth largest number.

[madhan ravi]

when you specify n as 5 the last number in the result is the fifth largest number

Answer 2

[Dong Shim]

B=unique(A);

% 'unique' also sorts A in the ascending order.

disp(B(end-4))