Question The system keeps track of available amount of flour to make cakes. It starts with inputting the quantity of 5kg flour from the user. If the quantity is invalid, it loops until the quantity is valid. Once the initial quantity is given, the user can perform the following activities. Each activity is done in a separate method: ● Make cake this method reads the quantity of cake to make. Each cake requires 400 grams of flour. It returns the quantity to update the main if input quantity is valid. It prompts error messages if quantity is invalid. ● Add flour - this method reads the quantity of 5Kg flour to add. It returns the value to update the main if input is valid. It prompts error message if input is invalid. • Check stock - this method displays the o total quantity of 5kg flour bought o the quantity of cakes made O the total gram of flour bought o the total gram of flour used o the total gram of flour remains. User can perform the activities repeatedly until a quit option is chosen. You are required to fulfill the following requirements: Write the program under only 1 class without using any object and object variables All methods are static methods. • • Provide input validation and prompt appropriate error messages for invalid input Use selection structure for selection options Use loop structure to handle looping of activities Handle each activity with a different method . Use only local variables to pass and return data needed to and from main. Below shows an example of the input and output of the program: Input the number of 5kg flour to start: -5 Invalid input, quantity must be positive Input the number of 5kg flour to start: 0 Invalid input, quantity must be positive Input the number of 5kg flour to start: 4 4 of 5kg flour added. Menu: 1. Make Cake 2. Add flour 3. Check record 1. Quit Invalid quantity Menu: 1. Make Cake 2. Add flour 3. Check record 4. Quit Enter selection (1-4): 1 Enter quantity of cake to make: 20 20 cakes made. flour left is 12000 gram Menu: 1. Make Cake 2. Add flour 3. Check record 4. Quit Enter selection (1-4): 1 Enter quantity of cake to make: 50 Insufficient flour. Available flour is 12000 gram Menu: 1. Make Cake 2. Add flour 3. Check record 4. Quit Enter selection (1-4): 2 How many 5kg flour to add? 5 5 of 5kg flour added. Menu: 1. Make Cake 2. Add flour 3. Check record 4. Quit Enter selection (1-4): 3 Total quantity of 5 kg flour bought: 9 Total quantity of cake made:20 Total flour bought: 45000gram Total flour used: 8000gram Total flour left: 37000gram Menu: 1. Make Cake 2. Add flour