4. a software company sells several items with the following cost: games - $10, anti-virus - $50, e-books - $5, tax software - $100, and matlab student- $150. create a program that displays the items in a menu and asks the user to select an item and asks for the quantity of that item. the program should continue to display the menu until the user no longer wishes to make a selection (the menu should have an option to exit). after the user is done making selections the program should sum up the total cost. a) complete all parts of the program using loops and put all functions for this program

Steam at a pressure of 100 kpa and a quality of 50% initially fills a rigid vessel having a volume of 0.5 m^3. the steam is then heated, causing the pressure in the vessel to rise to 150 kpa. determine: i. the mass of the steam in the vessel. ii. the temperature and quality of the steam after the heating process. ii the mass of the vapour, mg and liquid, m in the vessel after the heating process. if the steam in the vessel is now further heated, what would the pressure and temperature in the vessel be when all steam has turned into saturated vapour? b. sketch the processes in part (a) and part (b) on p-v and t-v diagrams, indicating clearly the temperatures, pressures and the paths. c. (0.59kg, 111.4°c, 73%, 0.4307kg, 0.1 593kg, 2.11 bar, 121.84°c)