please help me

A neuron k receives input from four other neurons are 3.5, -5, 2.5 and -1.7. The corresponding synaptic weights are 1.5, -2.5, -1.6 and -1 Assume the bias as 1. (2 marks) i. Calculate the linear combiner output of neuron k. ii. Find the output by using Sigmoid function (a=2) as a nonlinear function. iii. Calculate the McCulloch pitts model of neuron k