Please help with the following question. Please include all steps to calculate this problem.

Suppose a firm has 15.9 million shares of common stock outstanding and six candidates are up for election to four seats on the board of directors. a. If the firm uses cumulative voting to elect its board, what is the minimum number of votes needed to ensure election of one member to the board? b. If the firm uses straight voting to elect its board, what is the minimum number of votes needed to ensure election of one member to the board?