Question 4: (7 Marks) Write VB code that computes and displays the result of the following summation in lblSum: 2 3 10 1+ + + ...t 19 + -Page Break Question 5: (8 Marks) Design a Graphical User Interface (GUI) for a VB application that serves as a Room Charge Calculator for a hotel. The application shall: Display hotel's logo - Read number of nights, nightly charge, room service and telephone charge Compute subtotal as follow: subtotal = (nights x nightly charge) + room service + telephone charge Compute VAT as 0.05 of the subtotal Compute Total Charges, as follow: total_charges = subtotal + VAT - Display subtotal, VAT and total charges Write down the name of each control next to your design