build a web application

Virtual exchange office. An anonymous / unregistered user can see all currencies in the form of an image gallery, and by selecting a currency he gets exchange rate information and an audio recording with the national anthem if it is set. Registerd user in addition to its functionalities, the registered user has all the functionalities as well as the unregistered user. The user can enter, view and update the amounts at his disposal and in which currency. It can send a request to sell the amount of some currency at its disposal. When creating a request, he must choose the amount and currency he is selling and the currency he is buying, and the date and time of creating the request are automatically entered (the status "accepted" is 2). The amount he sells cannot be greater than the current amount he has in that currency. The user sees a list of all requests sent with information of selling and buying currency, what amount of sale and the status of whether it was accepted or rejected. Moderator in addition to its functionalities, the moderator has all the functionalities as well as the registered user, and in addition can see the requirements of all users seeking the sale of currency. The moderator can accept (status "accepted" is 1) or reject the request (status "accepted" is 0) of the user only if the time to sell that currency is in the range defined by the administrator. Upon acceptance, the available amounts with the user at that time are automatically updated. The requirements that can be worked with are especially indicated. The moderator can update the exchange rate for which he is in charge once a day, so the date of currency update is entered for each update. Administrator in addition to its functionalities, the administrator has all the functionalities as well as the moderator. Enters, updates and reviews system users and defines and updates their types. Enters, views and updates currencies. The base currency is kuna. When entering, you must enter the name of the currency (eg euro), the exchange rate (eg 7.5), the moderator in charge of the currency, select the country image (URL to image on the Web) and optional audio track (URL to audio on the Web with national anthem) ) and define the time of day when it is possible to sell a currency. The time of day is defined by the time from and to (from 07:00 to 10:00). One currency is managed by only one moderator, and one moderator can manage multiple currencies. The administrator sees the total amount of currencies sold based on the accepted requests, and can filter the data based on the moderator who accepted the request and the time period for creating the request. The period is defined by the date and time from and to. the task is accompanied by a database Also you must use only HTML, CSS, PHP and SQL