in C#/ Ever heard of acid rain. This is rainfall with a very low pH. Write an application that will enable you to display the pH level for a swimming pool and whether an additive is needed or not. The pH is a measure of how acidic or basic the water is and is typically given on a 0-14 scale. Below 7.0 is defined as acidic, with 7 being neutral. Levels much above 7 are said to be basic or alkaline. Everything that enters a pool has a pH value. To have pH in balance the wayer is adjusted with additions of pH increasers (bases) or pH decreasers (acids) to achieve the range of 7.2-7.8. Allow the user to input the pH level number. Display a message indicating the health (i. e., acidic, neutral, or alkaline) and whether an additive is required. If an additive is required, identify the type. The water shpuld be described as acidic, requiring bases, when the pH is lower than 7. Consider the pH levels as neutral for pH levels in the range 7-7.8 and alkaline, requiring acid for pH levels greater than 7.8. Display an appropriate message when invalid values are entered.

Idon understand these and need some ! ?

Arecipients list has been loaded into a document. which commands should be clicked in order to filter the list so that letters will not be printed for recipients who live in a certain state? mailings tab, start mail merge, select recipients, type new list, then insert only contacts from the desired states mailings tab, rules, select recipients, use existing list, then choose a recipients list that includes only contacts in certain states mailings tab, select recipients, use existing list, rules, fill in, then type in certain states mailings tab, rules, skip record select “state” under field name, then type in the state name under “equal to”

File account. java (see previous exercise) contains a definition for a simple bank account class with methods to withdraw, deposit, get the balance and account number, and return a string representation. note that the constructor for this class creates a random account number. save this class to your directory and study it to see how it works. then write the following additional code: 1. suppose the bank wants to keep track of how many accounts exist. a. declare a private static integer variable numaccounts to hold this value. like all instance and static variables, it will be initialized (to 0, since it’s an int) automatically. b. add code to the constructor to increment this variable every time an account is created. c. add a static method getnumaccounts that returns the total number of accounts. think about why this method should be static - its information is not related to any particular account. d. file testaccounts1.java contains a simple program that creates the specified number of bank accounts then uses the getnumaccounts method to find how many accounts were created. save it to your directory, then use it to test your modified account class.