Huixian mother buys some shares of company A on day 0. On day 7, the share price of company a is $4. 60. If she sells all her shares pf company A and buys 2000 shares of company B on day 7, she would receive $7400. On day 12, the share price of company A is $4. 80 and the share price of company B is $0. 50 less than that on day 7
If she sells all her shares of company A and buys 5000 shares of company B on day 12, she would have to pay $5800. Find
a. The number of shares of company A huixian mother has.
b. The share price of company B on day 12
