are use the information below to answer questions 7 -9 Iris Company projects that cash outlays of 45 million will occur uniformly throughout the hear. Iris plans to meet its cash requirements by periodically selling marketable securities from its portfolio. The securities invested to earn 12%, and the cost per transaction of converting securities to cash P30. 7. What is the optimal transaction size for transfers from marketable securities for cash? 8. What will be Iris' average cash balance? 9. Compute the cost of keeping cash based on optimal transaction size