Qg+10000-25Pg+20Ph+30Pr-15Pdv-35Psc-10Pmm+0.05Ag+0.03A-25C+0.1Y

Qg=the number of new Grapple tablet(in $).

Pg=the price of each Grapple tablet (in $).

Ph= the price of each Hewpaq tablet (in $).

Pr =the price of each Ronova tablet

Pdv = the price to equip a tablet with Holographic digital video( in $, this is an upgrade option that enables three dimensional graphics on a tablet. Two dimensional graphics is standard equipment).

Psc= the price of various screen sizes (in $, a 8 inch is standard, but upgrade options are 10 inch extra sharp, 12 inch, 12 inch extra sharp, Each also has a touch-screen option. The upgrades get progressively more expensiveas the size and capability increases).

Pmm= the price of memory chip upgrades( in $). More 2 Gigabyte(Gb) chips can be added. Of course each added 2 Gb chip costs more. one 2 Gb chip is standard.

Y= average annual disposable income of a typical tablet purchaser (in $).

Ag= average age of a tablet purchaser (in years).

A= average annual Grapple advertising expenditure (in $).

C=number of computer systems the average tablet purchaser already owns.

1. If all variables remain unchanged except for the price of Hewpaq (Ph) laptops, which increases by $50, then the demand for Grapple tablets will (show work)?
2. If all variables remain unchanged except the price of screen sizes (Psc), which increases by $50, then the demand for Grapple tablets will(show work)?
3. If all variables remain unchanged except the price of Holographic digital video (Pdv), which increases by $30, then the demand for Grapple tablets will (show work)?