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