1. loss rate decreases ie, efficiency increases, throughput = efficiency * bandwidth,so throughput increases.
2.RTT increases means Tp increases, so windowsize =1 + Tt/Tp decreases , as throughput=L/1+2a ,so throughput increases.
3.Windowsize decreases ,so throughput will increase.considering Throughput =Length of the packet/window size)
Correct me if I am wrong.