Please help me with my test, I beg thank you

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample

In the triangle rst, rs = 65 and st = 60. which equation could be used to find the value of angle s?