The diagram shows the market for loanable funds.
Which changes could cause the equilibrium to move from ${E_1}$ to ${E_2}$?
1 )
an increase in the propensity to save and an increase in bank lending
the discovery of oil reserves and an increase in the propensity to save
3 )
advances in technology and a decrease in bank lending
4 )
a decrease in the propensity to save and the introduction of new products
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