Using Java: Write a program to perform the following operations on a stack. a) Create functions for push and pop operations of the stack. b) Write a function to convert an infix expression to a postfix expression. Pass a one-dimensional character array P to the function as input (infix exp) and return character array Q (postfix exp). Test your program for the following input P : ( A – (B / C ) * D + E ) * F % G c) Write a function for the evaluation of a given postfix expression. For testing pass the postfix expression Q of part b and supply the following set of values. A = 90, B = 50, C = 2, D = 3, E = 1, F = 2, G = 5

Implement a function ingredients in Python that takes a recipe and returns a dictionary of the ingredients needed. Details:   accepts one multiline str argument containing a recipe each line of the recipe is either an instruction line or an ingredient line. The ingredient lines contain the character ':' , the instruction lines do not. instruction lines should be ignored ingredient lines will be structured like 'active dry yeast: 10g' . This breaks down as: an ingredient, e.g., 'active dry yeast' (can be multiple words) the character ':' followed by a space the quantity, e.g., '10g' , which will always be an integer (number of digits can vary) followed always by the letter 'g' ( for grams) note- that a particular ingredient may appear on more than one line, see sourdoughStarter below The function ingredients should output a dictionary: keys are ingredients each value is an int specifying the number grams of that ingredient used in the recipe if an ingredient appears on more than…

Write a C++ program incorporating recursion to solve the following problem. The program should compile and execute under the UNIX gcc or g++ environments. (show this please) In this program it needs to accept a sequence of k characters from the user and use the characters to produce a k concentric squares. Also assume that there is an index origin of 1, the outermost square is made up of the letter a[k], the square inside that is made from the letter a[k-1], the square inside that is made from the letter a[k-2], and so on, with the innermost square made from the letter a[1]. For example, if k=5, and the values of a are ("R","O","C","K","Y") then the executed program should display:   Y Y Y Y Y Y Y Y Y Y K K K K K K K Y Y K C C C C C K Y Y K C O O O C K Y Y K C O R O C K Y Y K C O O O C K Y Y K C C C C C K Y Y K K K K K K K Y Y Y Y Y Y Y Y Y Y To make this program simpiler to do if you implement it in C++ and write a class; instances of this class can be passed by value. If a class is…