Exercise functions

Programmer services are required. 3 relatively simple functions must be performed

(1) Data is output from the database to the SomboBox so that when selecting a first specific phone number, the rest display associated values.
For example, we have selected or entered the phone number that is in the database and is in line 5, so the values of “visits” and “discount” (which are in the same table) should also be taken from line 5.

(2) Specify the conditions for the value of the "discounts"
When unloading the value of "Visits" they should form a discount:
0-5 visits - 0% discount
6-10 visits - 5% discount
11-15 visits - 7% discount
15+ visits - 10% discount

3) When you press the button "close the table" you need to accompany the values of the selected phone number (all the same example - line 5), such as "visit" and "discount" are rewritten.
For example, we chose the 5th line on the account "phone number" and its value of the visit = 10, its characteristic discount = 5%.
We press the button "close the table" and his visit gets +1, now the visit is typical = 11, due to this discount = 7%, and it should be re-recorded in the database.

Just write me the price and how long you need. The sooner the better.