There are 100 sellers in the market for widgets: 40 people are willing to sell a widget at £10 or more; 20 additional pe

[answerhappygod]

There are 100 sellers in the market for widgets: 40 people are
willing to sell a widget at £10
or more; 20 additional people are willing to sell a widget at £20
or more; 30 additional people
are willing to sell a widget at £30 or more; and 10 additional
people are willing to sell a
widget at £50 or more.
(a) For a range of prices from £0 to £70, draw the supply curve in
a suitably
labelled graph.
(b) The government will buy any amount of widgets for £40 or less.
Draw the
demand curve. How many widgets are sold in equilibrium?