C++
A software company sells a package that retails for $99. Quantity discounts are given according to the following table.

Quantity Discount

10-19 20%
20-49 30%
50-99 40%
100 or more 50%

Write a program that asks for the number of units sold and computes the total cost of the purchases.
Input validation: Make sure the number of units is greater than 0

The output should be appropriately formatted; in particular, dollar amounts should show two digits after the decimal.
Show the regular price, the discount, and the discounted price for the transaction in a table.

Please write a c++ program in the simplest manner possible. This is my first programming class. Help is highly appreciated

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.

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