Answer the following. Show all your work. Use the modular approach to solving this problem. Provide 3 submodules as follow: 1) Data input - module to input all required data; 2) Calculations - module to compute the gross pay; and 3) Output - module to display the results (gross pay). 

Using the Program Development Cycle, develop an algorithm using pseudocode for the following task. The algorithm should be developed in 5 phases. Thoroughly analyze this task and provide all the information for each phase (Description, Test Plan, Pseudocode, Execute, Answer). Provide input and output variable names as well as internal documentation. 

Draw a hierarchy chart for this task also. 

1. The owners of the A-Z Supermarket would like to have a program that computes the monthly gross pay of their employees. The input for this program is an employee ID number, hourly rate of pay, and number of regular and overtime hours worked. Note: gross pay is the sum of the wages earned from regular hours and overtime hours; overtime is paid at 1.5 times the regular rate. 

Format of output: Gross Pay of Employee 11111 is $450.00