Write and evaluate an expression to find the number of band members in each formation. there 75 in the band

4. One part of the formation has eight rows with five band members per row. The other part has four rows with seven members in each row.

5. One part of the formation has three rows with thirteen band members per row. The other part has six rows with six members in each row.

6. 'One part of the formation has seven rows with seven band members per row. Another part of the formation has four rows with four members in each row. The last part has three rows with three members in each row.​