use c not c++ please

and dont use string library

Suppose you are a renewable energy engineer and you need to calculate the energy in some waves Write a program that performs the following 1 Dec. Swo stuctus, the test structure called Particle with the following members Agency (font) Anglade (int) and linear density) And the second structure catec Wave with the clicwing members number inname (string) Typestring), and WaveParticle Partici) Noteit type the the wave is ongtudinal wave and type then the wave is transverse 3. Ak the to enter the information of waves and save them in any cated Spectrum the atunction called Energy that takes the way Spectrum o an orpanort and conciliate the energy (E) for of waves that have the you Truter or waves that have the name Ursund in the Spectrum ang the following om E = V. Angular frequency 2. Amplitude? . linear density loy the man call the function Energy and print theory for Transverse or Und wenn e Spectrum Same Olot Enter the information of 5 waves: Wavel Number: 1 Name: Water Type: Trans Angular_frequency: 1.0 linear denty: 4.0 Amplitude: 3 Wave2 Number: 2 Name: Ultrasound Type: Long Angular frequency: 2.0 linear density: 4.0 Amplitude: 3 Wave3 Number: 3 Suppose you are a computer engineer at GJU and you need to check the validity of password for MyGJU-Email, Write a C program that is responsible for checking the validity of password entered by the user 1 In the main function declare a string that can hold up to 50 characters and ask the user to enter a string 2. in separated function check whether the string entered by the user is valdas.password. The string is considered valid as password if its deaths between 10.10.15.characters starts with habets, and composed of a mothes and ambers only 3. In the man tunction print out the strong and tell the user whother or not tis valid password based on the result of port Hints: Test out the program by checking the following strings: "Abc123. Noe vald, because its length a less than 10 characters abcyzt230 Valid abcdothymn Not valid because it contains only alphabets 1234567890123" Not valid because contains only numbers bef123590123". Not valt because it contain special characters A