please Solve this math problem

Answer:
Use this link
https://www.calculator.net/fraction-calculator.html?t1=4&op=*&t2=2&b1=12&b2=8&ctype=1&x=68&y=37
Step-by-step explanation
It will help you :)
Answer:
Please watch Multiplying Fractions by mathantics or Math Teacher Gon on y o u t u b e
For number 4, watch Multiplying Mixed Numbers and Fractions by Math With Mr. J