Can you please help in providing the steps / calculations to arrive at the following answers:

In the market for Apple's iPhone, the quantity demanded is

Q_D = 20,000 - 20P_A + 5P_G + P_S - 1000P_M,

where P_A is the price of the Apple iPhone, P_G is the price of the Google Android phone, P_S is the price of Samsung's device and P_M is the monthly price of data per gigabyte.

This formulation of demand implies that the iPhone and the Android are seen as:

__2 ___1. complements or 2. substitutes. (Write 1 or 2 in the blank.)

This formulation of demand implies that consumers see which devicethe Android or the Samsungas the closest substitute for the iPhone?

__1 ___1. Android or 2. Samsung.(Write 1 or 2 in the blank.)

The iPhone supply equation is Q_S = -1300 + 30P_{A .}

Assuming that the price of the Android is $300, the price of the Samsung is $200 and the monthly price of data is $3 per gigabyte, determine the equilibrium price and quantity of iPhones sold.

P_A __$400__Q_10,700__

What are the own price elasticities of iPhone demand (E_D) and supply (E_S) at this P and Q?

E_D__-0.75__ E_{S___}1.12____